Meaning

noun any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

noun street name for lysergic acid diethylamide

adjective harsh or corrosive in tone

originEtymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-éh₁ti Proto-Indo-European *-yeti Proto-Indo-European *-éh₁yeti Proto-Indo-European *h₂eḱéh₁yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dʰeh₁-der. Proto-Italic *-iðos Latin -idus Latin acidusbor. French acidebor. English acid From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

Etymology from Wiktionary, CC BY-SA 3.0