Crass
来自Big Physics
late 15th century (in the sense ‘dense or coarse’): from Latin crassus ‘solid, thick’.
wiktionary
From Middle English cras, craas, from Old French cras, from Latin crassus(“dense, thick, gross, fat, heavy”). Doublet of grease.
etymonline
crass (adj.)
1540s, "thick, coarse, gross, not thin or fine," from French crasse (16c.), from Latin crassus "solid, thick, fat; dense," which is of unknown origin.
The literal sense always has been rare in English. The meaning in reference to personal qualities, etc., "grossly stupid, obtuse" is recorded from 1650s, from French. Middle English had cras (adj.) "slow, sluggish, tardy" (mid-15c.), also crassitude "thickness." Related: Crassly; crassness.
