neologism
n.
"practice of innovation in language," 1772 (in a translation from French), from French néologisme, from neo- (see neo-) + Greek logos "word" (see lecture, n.) + -ism. Meaning "new word or expression" is from 1803. Neological is attested from 1754.
〔李〕n.新词；旧词的新义 [log=to speak] ←neo-[GK] =new新
〔蒋〕[neo-新，log言，词，-ism表示语言] 新语，新词