Flexibility in the Parts-of-Speech System of Classical Chinese

Languages across the world differ from each other in a number of respects, and one such difference is in terms of how their lexicons are categorized. Compared to most European languages with distinct, functionally dedicated word classes in the traditional sense, quite a few languages are observed to possess lexical items that can fulfill the functions typically associated with more than one traditional word class such as 'noun' and 'verb'. According to Rijkhoff and van Lier (2013), these lexemes exhibit what is called 'flexibility'.
Classical Chinese is observed to feature word-class flexibility, in the sense that there are lexemes that can be used to serve the functions of two or more traditional word classes, without the functional change being marked by any derivational means. For instance, a lexical item like xìn can either function as a verb meaning 'to be trustworthy [intr.]' or 'to believe, to trust [tr.]' or serve as a noun meaning 'trust, oath of alliance'. Similarly, a human-denoting lexeme such as y u FRIEND cannot only mean 'a friend' but also 'to be a friend, to behave friendly [intr.]', 'to make friends with [tr.]' or 'to consider as a friend [tr.]'; an instrument word like bian WHIP cannot only mean 'a whip' but also 'to whip'. This situation is often thought to be related to the fact that Classical Chinese does not have any kind of productive morphology in the traditional sense (e.g. Zádrapa 2011). This is reflected in the lack of markedness distinctions across Croft's (2000, 2001) conceptual space for parts of speech.
This study ascribes flexibility of parts of speech in Classical Chinese to precategoriality, in line with Bisang (2008 a, b). Precategoriality can roughly be defined as the absence of the noun-verb distinction in the lexicon; instead, the linking of individual words to the syntactic position of N or V as well as their text frequency in these positions are subject to pragmatics. Precategorial lexical items are those that are not