Grammaticalization in Morphology

Grammaticalization is traditionally defined as the gradual process whereby a lexical item becomes a grammatical item (primary grammaticalization), which may be followed by further formal and semantic reduction (secondary grammaticalization). It is a composite change that may affect both phonological, morphological, syntactic, and semantic-pragmatic properties of a morpheme, and it is found in all the world’s languages. On the level of morphology, grammaticalization has been shown to have various effects, ranging from the loss of inflection in primary grammaticalization to the development of bound morphemes or new inflectional classes in secondary grammaticalization. Well-known examples include the development of future auxiliaries from motion verbs (e.g., English to be going to), and the development of the Romance inflection future (e.g., French chanter-ai ‘I sing’, chanter-as ‘you sing’, etc., from a verb meaning ‘to have’). Although lexical-grammatical change is overwhelmingly unidirectional, shifts in the reverse direction, called degrammaticalization, have also been shown to occur. Like grammaticalization, degrammaticalization is a composite change, which is characterized by an increase in phonological and semantic substance as well as in morphosyntactic autonomy. Accordingly, the effects on morphology are different from those in grammaticalization. In primary degrammaticalization new inflections may be acquired (e.g., the Welsh verb nôl ‘to fetch,’ from an adposition meaning ‘after’), and erstwhile bound morphemes may become free morphemes (e.g., English ish). As such effects are also found in other types of changes, degrammaticalization needs to be clearly delineated from those. For example, a shift from a minor to a major category (e.g., English ifs and buts) or the lexicalization of bound affixes (isms), likewise result in new inflections, but these are instantaneous changes, not gradual ones.