deperishEtymologyFrom Middle English deperishen, from Old French deperiss-, extended stem of deperir, from Latin deperīre (“to die down, to perish gradually”).deperish means To waste away; to deteriorate. Lexicurio rates it Rare gem — a strength score of 76 out of 100.verbTo waste away; to deteriorate.“We shall pull him through this awkward pass; but sometimes I fear that we shall do so only to see him deperish from mere inanition and want of nourishment ...”