expound v. + Add to list US //ɪkˈspaʊnd// UK //ɛkspˈaʊnd// ex·pound SynonymsAntonymsEtymology Synonyms dilateelaborateenlargeexpandexpatiateexpositlucubrate Antonyms contractOriginLATexpono→OFRespondre→MEexpounden→ENexpound From Middle English expounden, from Old French espondre, from Latin exponere. Doublet of expone and expose.