No CrossRef data available.
Published online by Cambridge University Press: 01 January 2026
A key notion in understanding language is ‘possible word (lexeme)’. While there are lexemes that are internally homogeneous and externally consistent, we find others with splits in their internal structure (morphological paradigm) and inconsistencies in their external behavior (syntactic requirements). I first explore the characteristics of the most straightforward lexemes, in order to establish a point in the theoretical space from which we can calibrate the real examples we find. I then schematize the interesting phenomena that deviate from this idealization, including suppletion, syncretism, deponency, and defectiveness. Next I analyze the different ways in which lexemes are ‘split’ by such phenomena. I set out a typology of possible splits, along four dimensions: splits that are (i) based on the composition/feature signature of the paradigm versus those based solely on morphological form; (ii) motivated (following a boundary motivated from outside the paradigm) versus purely morphology-internal (‘morphomic’); (iii) regular (extending across the lexicon) versus irregular (lexically specified); (iv) externally relevant versus irrelevant: we expect splits to be internal to the lexeme, but some have external relevance (they require different syntactic behaviors).
I identify instances of these four dimensions separately: they are orthogonal, and therefore not dependent on each other. Their interaction gives a substantial typology, and it proves to be surprisingly complete: the possibilities specified are all attested. The typology also allows for the unexpected patterns of behavior to overlap in particular lexemes, producing some remarkable examples. Such examples show that the notion ‘possible word’ is more challenging than many linguists have realized.
The support of the ERC (grant ERC-2008-AdG-230268 MORPHOLOGY), the AHRC (grant AH/ I027193/1 ‘From competing theories to fieldwork: The challenge of an extreme agreement system’, and grant AH/K003194/1 ‘Combining gender and classifiers in natural language’), and the ESRC and AHRC jointly (grant ES/I029621/1 ‘Endangered complexity: Inflectional classes in Oto-Manguean languages’) is gratefully acknowledged. The analyses presented here have been well aired at different meetings, and I thank all those present who helped to clarify the typology: University of Bremen, September 2009; Vrije Universiteit Amsterdam, November 2009; Matica Srpska, Novi Sad, September 2010; 29th International Conference on Lexis and Grammar, Belgrade City Library, September 2010; the Société de Linguistique de Paris, December 2010; Department of Linguistics, UC Santa Barbara, February 2011; Department of Slavic Languages and Literatures, UC Berkeley, February 2011; 6th Meeting of the Slavic Linguistics Society, Université de Provence, Aix-en-Provence, September 2011; Societas Linguistica Europaea, Universidad de la Rioja, September 2011; 8th Mediterranean Morphology Meeting, Cagliari, September 2011; Philipps-Universität Marburg, October 2011; Hokkaido University, Slavic Research Centre, Sapporo, November 2011; University of the West of England, February 2012; HSE Moscow, May 2013; CIESAS Sureste, July 2013; Association for Linguistic Typology, Leipzig, August 2013. For helpful comments on previous versions I am particularly grateful to Stephen Anderson, Matthew Baerman, Olivier Bonami, Dunstan Brown, Wayles Browne, Patricia CabredoHofherr, Marina Chumakina, Scott Collier, Nick Evans, Sebastian Fedden, Tim Feist, Alice Harris, Andrew Hippisley, Alexander Krasovitsky, Enrique Palancar, Gilles Polian, Erich Round, Greg Stump, Anna Thornton, and Claire Turner, to Greg Carlson (editor), Stanley Dubinsky (executive editor), and Adam Albright (associate editor), and to Lisa Mack and Penny Everson for help in preparing the manuscript.