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Published online by Cambridge University Press: 20 December 2005
Both Iverson and Salmons 2004 and Voyles 1982 develop viable theories of the Old Norse i-umlaut. It is argued, however, that while Iverson and Salmons' theory posits implausible changes, the changes assumed by Voyles are plausible and well attested.
The crux of the Old Norse (ON) i-umlaut problem resides in the masculine i-class nouns. While the long-stem nouns, such as Old Icelandic (OI) gestr ‘guest’ (< +gast+iR), generally show i-umlaut, the short-stem nouns such as OI staÐr ‘place’ (< +staÐ+iR) generally do not. In what follows, I first summarize and critique the Iverson and Salmons 2004 account (the I&S theory) of these developments. I then present an alternative account (first proposed in Voyles 1982, hereafter the V theory), and discuss Iverson and Salmons' critique of this theory.
Under the I&S theory, three stages of ON i-umlaut are posited. In the first stage, both i-umlaut and vowel syncope are active in Old Norse. The former fronts vowels preceding a short or long /i/ or /j/ in the following syllable, and the latter deletes a mora of length after a long syllable. Below in 1 are the derivations for the nominative singular and plural forms of a short- and a long-stem noun:

According to Iverson and Salmons (2004:93), the second stage proceeds as follows:
With umlaut still alive in the phonology (that is to say, vowels were still fronted when a following i was phonetically present, as in gestiR NOM.PL.), we surmise that a new generation of learners, seeking common phonetic ground with the previous generation, inferred that because umlaut could not be predicted from the surface environment in long-stem words like [gestR] NOM.SG., the most coherent account was simply to posit vowels as already front in their underlying representations.
That is, the underlying forms /gast+iR/ and /gast+iiR/ were—on the basis of the occurrence of the surface form [gestR]—restructured to /gest+iR/ and /gest+iiR/, respectively. Hence, at this stage, the derivation was as in 2.

Finally, in the third stage, i-umlaut “died,” that is, it was no longer phonologically conditioned.1
As a parallel type of development, Iverson and Salmons (2004:101) cite Dresher's (2000) analysis of Middle English open syllable lengthening, which, like the purported ON i-umlaut case, resulted in an “opaque” derivation. I reject this comparison in section 2.2.

According to this account, the originally umlauted forms such as [steÐiR] (for which there is absolutely no graphemic evidence) all now revert to [staÐR]. In an attempt to cite a parallel case of reversion, Iverson and Salmons (2004:97–8) state:
Interestingly, a close parallel to this specific reversion exists elsewhere in Germanic: The Old High German Rückumlaut verbs must once have evidenced umlaut, which came to be lost by analogy, as argued persuasively by Robinson (1980). For this class of forms, with umlautless preterite optatives like branti ‘would have burned’ (compare brennen ‘burn’), Robinson has laid out a solid structural case for reversion from previously umlauted forms, namely, avoidance of ambiguity in the key verbal categories of present vs. preterite optative.
In fact, as I argue in 2.2, the view that the Old High German (OHG) case can provide a parallel to the purported ON development rests on a misinterpretation of the OHG data, which leaves the Iverson and Salmons analysis based on a type of wholesale analogical change otherwise unattested.
The belief that OHG umlaut originally applied across the board to all forms is an article of faith rather than one of empirical evidence. In fact, as argued in some detail in Voyles 1991, there is absolutely no evidence or reason to believe that the OHG i-umlaut rule was ever exclusively phonologically conditioned. As Iverson and Salmons (2004:97–98) note, if OHG umlaut had indeed applied to the past subjunctive forms of verbs with stem-final dentals, such verbs would have become practically homophonous with the present indicative forms; for example, in (the admittedly few) cases such as the infinitival forms senten ‘send’ and resten ‘rest’, umlaut would have resulted in the past plural subjunctive forms *sentīn or *restīn (instead of the attested and non-umlauted sentīnand rastīn).2
Note that + is used for reconstructed forms, and * for incorrect or unexpected forms.
See Voyles 1991 for further discussion.
It should also be added that, contrary to the assumption underlying the I&S theory, many—if not most—phonological changes are at least in part morphosyntactically conditioned, even from their earliest time of occurrence (see Voyles 1991). In fact, numerous instances of partial morphosyntactic conditioning in newly added phonological rules are attested. For example, in the case of African American Vernacular English (AAVE), Labov (1972:190) records the simplification of word-final clusters through the deletion of the final segment.4
For detailed discussion, see Labov 1994, especially chapter 20.
I conclude: a) that this kind of semantic ambiguity could not possibly have motivated the absence of i-umlaut in the short-stem ON nouns (and Iverson and Salmons do not posit such), and b) that the wholesale non-umlaut analogy in ON—whether by restructuring or reversion—as posited by Iverson and Salmons does not have a precedent in the OHG case, nor does it, as far as I can tell have a precedent anywhere else.
I now consider the purported parallel provided by Iverson and Salmons to the change whereby the ON underlying singular form /gast+iR/ and the plural form /gast+iiR/ were restructured to /gest+iR/ and /gest+iiR/, respectively. This change was triggered by the surface form [gestR], in which the occurrence of umlaut could not be predicted from the surface forms of long-stem words. In this sense, then, the derivations of the form had become opaque. The purported analog Iverson and Salmons cite is Dresher's (2000) analysis of Middle English (ME) open syllable lengthening.
Since the ME case is intended as a crucial parallel to the I&S interpretation of the ON change, I turn to Dresher's (2000) account in some detail. In this interpretation, there were two relevant Middle English phonological changes: open syllable lengthening (OSL) and trisyllabic shortening (TSS) (presumably occurring in that order), which are reflected in alternations of nominative singular and plural forms, such as those found in 4.

At the next stage, the vowels in inflectional endings are syncopated, yielding the forms in 5.

Dresher (2000:58–59) comments on this situation as follows:
The loss of the inflectional vowel leaves the vowel length situation in a confused state. In some words, there is lengthening in the plural, but no change in syllable structure, while in other words, but not all, the plural is associated with shortening. There are no prospects for salvaging a phonological rule from this situation. But even a morphological rule appears to be unavailable: we cannot, for example, associate length with any particular morphological category. Thus, there is no reasonable way to reconstruct a rule or set of rules that could lead to the observed alternations. In such circumstances, paradigmatic leveling is liable to step in. On this account, language learners despair of a rule, and opt instead to choose a consistent vowel quantity on a word-by-word basis [emphasis, JV].
Therefore the Modern English reflexes have various and random Middle English antecedents; tale < ME tāl; god < ME g

d; hole < ME hōl; beaver < ME bēver, and devil < ME d

vel.
Whether or not one agrees with Dresher's account is not at issue here. The point is that Iverson and Salmons cannot cite Dresher's analysis as a parallel to their account of ON i-umlaut. If it were, one would expect a restructuring on a word-by-word basis, and hence a more or less equal occurrence in Old Norse of umlauted and non-umlauted long stems (for example, gestr ‘guest’ alongside *brastr ‘lack’, instead of the actually occurring brestr), or at least some more long-stem non-umlauted forms, as opposed to the overwhelming preponderance of ON i-umlaut in the long stems. What Iverson and Salmons actually suggest is that the opacity that they posit results not in word-by-word changes à la Dresher, but rather in a new generalization, namely, umlaut in all long stems. That is, in Iverson and Salmons' terms, the long-stem forms have been “restructured,” but the proviso for the restructuring, namely “long stems,” does, in fact constitute a phonological condition. Accordingly, this analysis would seem to involve “salvaging a phonological rule from the situation,” and as such stands in direct contrast to the Dresher analysis—whether right or wrong—under which this is impossible.
As described in Voyles 1982 and 1992:115–118, the V theory assumes that the development of ON i-umlaut occurred as in 6, with the environment expanding in at least three successive stages:

V(V) represents a short vowel, a long vowel or a diphthong; k' and g' are the palatalized allophones of /k/ and /g/ when they occur before front vowels; and R, which was probably [z] at this time, develops from Proto-Indo-European /s/ by Verner's Law and eventually results in OI /r/.
Consider, for instance, the following derivations:

In the ON grammar, a process of vowel insertion—probably the ON reflex of the Indo-European rule of Sievers' Law, or perhaps, a restructured version of it—was interacting with ON i-umlaut. In any case, it represents a commonly occurring type of change, which can be represented as in 8.

According to 8, /i/ is inserted before /j/ after one of the following: a long vowel or diphthong plus at least one consonant; a short vowel plus at least two consonants; two syllables (with the second one ending in at least one consonant), that is, after a closed long foot.6
Note that in all three of these environments, at least one consonant, C1, must precede /j/. I return to this point immediately below.
With i-umlaut and Sievers' Law both active in the ON grammar, the occurrence of long-stem i-class umlaut versus its absence in short stems can be explained as follows. Even by very early ON times, the i-class was in the process of dissolution: virtually all the feminine i-class nouns had by this time already passed into the ō-class, for example, +aksl+iR ‘shoulder’ (early replacement of the i-class ending +-iR by the ō-class ending +-u) > +akslu > Old Icelandic

xl. The same process was, albeit at a slower pace, also under way in the i-class masculine nouns. The stems of such nouns (consisting of the root plus the i-class marker /i/) received the endings that generally belonged to the a-class (with a few from the u-class). Later, the i-class marker was dropped, after which the a-class endings were the only ones retained. In view of this, the derivation of most long- and short-stem nouns proceeded as follows:

Of course, the transfer of i-class nouns into other classes was wave-like within the lexicon. Therefore, there were a few nouns that retained the i-class marker /-(i)j-/ until stage 2 of ON i-umlaut. An example of this is the short stem, but nonetheless umlauted, OI bylr ‘breeze’ < +bul+jaR. Conversely, there are also a few nouns that lost the /-(i)j-/ marker early and hence did not undergo ON i-umlaut, for example, burÐr ‘birth’ < +burÐ+ijaR.
Iverson and Salmons (2004:91) attempt to discern a regularity in these irregularities:
The exceptional masculine long-stem forms without umlaut inflect like regular short stems (which are also without umlaut), while the exceptionally umlauted short-stem words inflect like regular (umlauted) long-stem nouns.
However, such cases are peripheral, and the Iverson and Salmons account is not totally accurate: the long stem sultr ‘hunger’ inflects like both gestr, as well as staÐr. And the short stem bylr ‘gust of wind’ also inflects likestaÐr, as well as gestr.
The V theory also accounts for the occurrence of ON i-umlaut in other classes. For example, in the j-class weak verbs, the ON i-umlaut occurs in long-stem forms throughout the paradigm since the i-umlaut occurred in these verbs earlier; hence, OI erfa, erfÐa, erfÐr ‘inherit’ < +ar

jan, etc. However, in the short-stem j-class weak verbs, in which the i-umlaut occurred later, the umlaut did not extend to the past indicative, but still occurred in the short-stem present, which retained the /j/; hence, OI telja, talÐa, talÐr ‘tell’. Note also in this connection the long-stem j-class weak verbs, which nonetheless inflect like telja above, such as OI lýja ‘mash’, lúÐa, lúÐr < +lūjan, etc. Although such verbs are long stems, they nonetheless inflect like a short-stem verb because Sievers' Law could not apply here to produce *lūijan. Therefore, the i-umlaut was not triggered by an /i/, but rather later by the /j/, as in the short-stem verbs.
Also, one can note in this connection the occurrence of i-umlaut throughout the paradigms of ja-class nouns, both short and long stems, since—unlike the i-class nouns—the ja-class nouns were not in the process of changing their declension: OI kyn < +kunja, as well as l

kner ‘doctor’ < +lāknijaR.
Iverson and Salmons (2004:89–90, note 6) offer the following three objections to the V theory. “First, the philological base of the analysis requires reading the inscription on the Stentoften Stone as the ‘guest’ word, which […] no longer appears tenable.” That is, what was once read as i-umlauted gestumR ‘guests’ is now read as non-umlauted hagestumR ‘stallions’. However, whether or not this is the case, the objection is immaterial. The inscription probably dates from ca. 675 C.E.; even if ON i-umlaut began later than 675 C.E., this has no bearing on the V theory. That is, the V theory maintains only that ON i-umlaut was operative sometime before the attestation of classical Old Icelandic. How long or shortly before this time is immaterial for the theory.
Iverson and Salmons continue: “Second, it seems odd for Sievers' Law still to have been active at this presumably late stage of umlaut development (see Kim 2001, for example).” Two points should be made with respect to this remark. First, it is by no means clear that Kim 2001 demonstrates that Sievers' Law—or perhaps some altered version of it— had died out by ON times. In fact, Kim does not address the question of the reflex of Sievers' Law in Old Icelandic, but only its reflex in Gothic. Further, Kim (2001:100) leaves open the possibility that Sievers' Law was more active in certain “conservative daughter languages,” among which may well have been Old Icelandic. Second, and on the contrary, ON inscriptions teem with instances of the application of Sievers' Law; for example, raunijaR ‘tester’ (ca. 200 C.E.) and

irbijaR (proper name, ca. 450 C.E.; Antonsen 1975:29, 48); auja ‘luck’ (ca. 500 C.E.), where Sievers' Law has predictably not applied, versus arbija ‘inheritance’ (ca. 400 C.E.), where it has (Johannesson 1923:105, 115); and in tālija ‘tool’ (ca. 250 C.E.; Noreen 1970:392). I take these reflexes to indicate that Sievers' Law was an active phonologically conditioned rule in the ON area at this time.
Further, Krause (1971:94), who also cites numerous attestations of Sievers' Law, remarks in this connection: “Eine ganze Gruppe solcher ‘inkorrekten’ Schreibungen sind die Bildungen mit -warijaR ‘Beschützer’.”7
“A class of such ‘incorrect’ attestations [of Sievers' Law] is formations [of proper names] with -warijaR ‘protector’” [translation, JV].
The third objection to the V theory is as follows (Iverson and Salmons 2004:90, note 6):
Tacking an extra set of endings onto the existing suffixes in a paradigm is itself peculiar in that double affix marking is typically only sporadic and idiosyncratic, as reflected in the hapax legomenon of the lone doubly marked plural in English, child-er-en. That is, analogy based on categories rather than individuals tends to replace endings, not build over them.
Iverson and Salmons are objecting to the “double affix marking,” that is, the positing of a-class endings “on top of” the i-class markers, which were retained for a time, but later lost, leaving only the a-class endings (see 9). However, pace Iverson and Salmons, systemic “double affix marking” has been seen to occur elsewhere. One instance of it is the wholesale transfer of the ōn-class weak verbs into the jan-class in Old English, Old Frisian, and Old Saxon. In these languages, there was a mass migration of all the ōn-class weak verbs into the weak jan-class. However, in this process, the ōn-verbs for a while retained their ōn-class marker, to which they added the jan-class endings. Eventually these verbs dropped the ōn-class marker, as in early West Germanic:

This transition must have occurred after the well-known Old English and Old Frisian palatalizations. Otherwise one would find Modern English */

/ instead of /meik/, and Old Frisian *matsia */

/ instead of /makia/. Also, it must have occurred after the time of Old English and Old Frisian i-umlaut; otherwise, one would find Old English *mekian and *sielfian, and Old Frisian *mekia and *selvia. Old Saxon is attested at a transitional stage in that it has makon,makojan and makian ‘make’ and sal

on, sal

ojan, and sal

ian ‘anoint’. The OHG verbs did not undergo this change; hence only machōn ‘make’ and salbōn ‘anoint’ occur.
Both of the theories discussed here give coherent accounts of ON i-umlaut. However, it has been argued that the I&S theory posits implausible and unattested types of change, whereas the V theory does not. ON i-umlaut is a perennially intriguing problem for Germanic linguistics, and Iverson and Salmons have appropriately identified it as a crucial issue. Exchanges continue to be useful, and I personally would like to see if progress could be made from the perspective of Optimality Theory.