Expressive

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late Middle English (in the sense ‘tending to press out’): from French expressif, -ive or medieval Latin expressivus, from exprimere ‘press out’ (see express3). Compare with express1.

wiktionary

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From Middle French expressif

etymonline

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expressive (adj.)

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.