-cide Look up -cide at Dictionary.com
word-forming element meaning "killer," from French -cide, from Latin -cida "cutter, killer, slayer," from -cidere, comb. form of caedere "to strike down, chop, beat, hew, fell, slay," from PIE *kae-id-, from root *(s)k(h)ai- "to strike" (Pokorny, not in Watkins; cognates: Sanskrit skhidati "beats, tears," Lithuanian kaisti "shave," German heien "beat"). For Latin vowel change, see acquisition. The element also can represent "killing," from French -cide, from Latin -cidium "a cutting, a killing."