- acrid
- 1712, from L. acer (fem. acris) "sharp, pungent, bitter, eager, fierce," from PIE *ak-ri-, from base *ak- "be sharp, rise (out) to a point, pierce" (cf. Oscan acrid "sharply;" Gk. akis "sharp point," akros "at the farthest point, highest, pointed," akantha "thorn," akme "summit, edge;" also oxys "sharp, bitter;" Skt. acri- "corner, edge," acani- "point of an arrow," asrih "edge;" Lith. asmuo "sharpness," akstis "sharp stick;" O.Ir. er "high;" Welsh ochr "edge, corner, border;" O.N. eggja "goad;" O.E. ecg "sword"). The -id suffix probably is in imitation of acid.