This article deals with the formation of nouns in Kabyle Berber. Analysis of Dallet’s (Dallet, Jean-Mari. 1982. Dictionnaire kabyle-français. Paris: Selaf) dictionary data has shown that 1) elements that appear in the plural but are absent in the singular are unpredictable and therefore part of the lexical ingredients of the root; 2) the plural template has a constant size of 5 CV units.