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Published online by Cambridge University Press: 12 March 2026
Current versions of feature geometry generally locate the features [consonantal] and [sonorant] as annotations on the root node, rather than as normal dependents of that or some other node. This geometry is intended to reflect the observation that, unlike other features, the major class features do not participate in phonological processes such as assimilation (spreading of a feature) or dissimilation (delinking of that feature). This article disputes the empirical observation concerning [consonantal]: several examples are provided where vowels or glides become consonantal next to consonants (assimilation) and where consonants become vowels or glides next to consonants (dissimilation). The feature geometry is modified to allow for such processes by placing [consonantal] as a daughter of the root node.
Special thanks are due to Reinhard Hahn, Larry Hyman, Christine Kamprath, David Odden, Jan-Olof Svantesson and Draga Zec. They provided much data and analysis of individual languages discussed here. Thanks also to Colin Ewen, Tracy Hall, Sharon Hargus, Harry van der Hulst, John McCarthy, Bill Poser, Pieter van Reenen, Jurek Rubach, Patricia Shaw, Norval Smith, Alice Taff, Leo Wetzels, Martha Youngscholten, and two anonymous Language referees for their help in tracking down examples and thinking about their consequences. Audiences of Lund University, the Free University of Amsterdam, The University at Leiden, Manchester University and the University of Washington provided provocative and helpful comments. All should be absolved for the misuses to which I may have put their suggestions. Portions of this work were supported by NEH grant FE-25621–91.
The following abbreviations are used in this paper for features: ant = anterior, asp = aspirated, bk = back, cons = consonantal, cont = continuant, cor = coronal, dist = distributed, dor = dorsal, hi = high, lab = labial, lar = laryngeal, lat = lateral, nas = nasal, and voi = voice.