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.
An agent noun is a derived noun whose general meaning is ‘person who does . . .’. It is thus characterized by the feature [+ Human], regardless of whether the person involved actually performs an action (e.g., French nageur ‘swimmer’, i.e., ‘a person who swims’), carries out a profession (e.g., Spanish cabrero ‘goatherd’, i.e., ‘a person who looks after goats’), adheres to a certain ideology or group (e.g., Italian femminista ‘feminist’, i.e., ‘a person who supports or follows the feminist movement’), and so on. Agent nouns are for the most part denominal (as with cabrero and femminista above) and deverbal (as with nageur above). Latin denominal agent nouns were mainly formed with -arius, though the Latin agentive suffix par excellence was -tor, which derived nouns from verbs. Latin denominal agents were also formed with -ista, a borrowing from Greek -ιστήϛ. The reflexes of all three suffixes are widespread and highly productive in the Romance languages, as in the case of Portuguese/Spanish/Catalan/Occitan pescador ‘fisherman’ (-dor < -torem), French boucher ‘butcher’ (-er < -arium), and Romanian flautist (-ist < -ista). At any rate, the distinction between denominal and deverbal agent nouns is not always straightforward, as demonstrated by the Romance forms connected with the Latin present particle -nte, for whereas the majority display a verbal base (e.g., Italian cantante ‘singer’ ← cantare ‘to sing’), there are some which do not (e.g., Italian bracciante ‘hired hand’ ← braccio ‘arm’), thus allowing them to be regarded as denominal derivations. A minor group of agent nouns is made up of deadjectival derivations, often conveying a pejorative meaning; such is the case with Italian elegantone ‘person of overblown elegance’ (← elegante ‘elegant’) and French richard ‘very rich person’ (← riche ‘rich’).
Giorgio Francesco Arcodia and Bianca Basciano
Sino-Tibetan is a highly diverse language family, in which a wide range of morphological phenomena and profiles may be found. The family is generally seen as split into two major branches, i.e., Sinitic and Tibeto-Burman, but while Sinitic is a fairly homogeneous group in terms of morphology, the so-called Tibeto-Burman branch of the family includes isolating languages like Karen, languages with transparent and regular agglutinative morphology (Lolo-Burmese, Tibetic, and Boro-Garo), but also paradigmatically complex languages, with elaborate argument indexation and transitivity management systems; while in some languages morphological complexity is mostly a conservative trait (e.g., Rgyalrongic and Kiranti), other languages developed innovative paradigms, with only few vestiges of the archaic system (Kuki-Chin). Some notable morphological phenomena in modern Tibeto-Burman languages are verb stem alternation, peculiar nominalization constructions, and long sequences of prefixes, which in some languages (Chintang) may even be freely permutated without any relevant change in meaning. Also, while Sinitic languages are normally taken to be a prototypical example of the (ideal) isolating morphological type (with virtually no inflection, stable morpheme boundaries, no cumulative exponence, and no allomorphy or suppletion), phenomena of strong reduction of morphemes, blurring of morpheme boundaries and fusion between root and suffix, and nonconcatenative morphology, as well as allomorphy and (proto-)paradigmatic organization of morphology, are attested in some Chinese dialects, mostly concentrated in an area of Northern China (Shaanxi, Shanxi, Henan, Hebei, and Shandong provinces). Moreover, ‘Altaic-type’ agglutinative morphology, including case marking, is found in Sinitic languages of the so-called Qinghai-Gansu Sprachbund; in this case, the development of agglutination, as well as other typological traits (as SOV word order), is clearly the product of intense and prolonged contact between Northwestern Chinese dialects and Tibetic and Mongolic languages of China. On the other hand, Southern Chinese dialects have developed in closer contact with Hmong-Mien, Tai-Kadai, and Austroasiatic languages, and are thus closer to the typology of Mainland Southeast Asian languages, with a very strong isolating profile.