expressive (adj.)youdaoicibaDictYouDict[expressive 词源字典]
c. 1400, "tending to press out," from French expressif, from expres "clear, plain," from stem of Latin exprimere "to press out," also "to represent, describe" (see express (v.)). Meaning "full of expression" is from 1680s. Related: Expressively; expressiveness.[expressive etymology, expressive origin, 英语词源]