From derivation to inflection: the case of the Turkish nominalizer (y)Iş

Abstract The Turkish nominalizer -(y)Iş demonstrates a broad spectrum of functions ranging from a deverbal word-formation device that forms lexicalized nouns with concrete and abstract meanings to an inflectional marker used in nominal clauses, especially in clausal complementation. In some uses, the item conveys manner semantics. While the item itself has been variously investigated and forms an established part of any Turkish grammar description, there is still a lack of consensus on its functional and semantic properties. This article investigates the morphosyntactic functions and the semantic features of the nominalizer -(y)Iş in light of the claims in the linguistic literature on the one hand, which include manner, countable events, factive imperfective, single instance of an event, direct reference to the inner process of an action, etc., and of examples from primary sources on the other, and evaluates the findings from the perspective of grammaticalization. It will be argued that the range of functions of this item and the fact that it seems to resist any straightforward analysis result from its transition from a derivational marker to an inflectional marker with tasks including complementizer functions, a process in which manner semantics will be argued to play a role.