apace adv. + Add to list US //əˈpeɪs// UK //ɐpˈeɪs// apace SynonymsAntonymsEtymology Synonyms chop chopquicklyrapidlyspeedily Antonyms slowlyOriginOFRà pas→MEapās→ENapace From Middle English apās (“step by step, slowly; quickly, rapidly; at once, promptly”), from Old French à pas (“at a quick pace”).