Abstract
Whereas adjectival suppletion across inflectional categories other than comparison is crosslinguistically uncommon, the Tocharian branch of Indo-European exhibits suppletion in the adjectives 'all', 'big, great', and 'good'. The origin and distribution of these suppletive stems is the focus of the present article.
Both 'all' and 'good' are characterized by unique stem distributions; for 'all', these result from parallel generalization in Tocharian A and B of substantivized forms for 'everything' (A puk, B po). For 'big, great', Tocharian A attests a split between singular tsopats and plural śāwe; the latter stem originally meant 'coarse, rough; made of large pieces', but expanded its semantic range with plural head nouns, a development closely paralleled in Balkan Romance.
An alleged fourth example, Tocharian A 'attractive', is in fact two separate adjectives referring to males and females, though there are signs that they were being extended to nouns of masculine and feminine gender respectively.