acidify v. + Add to list US //əˈsɪdəˌfaɪ// UK //ɐsˈɪdɪfˌaɪ// acid·i·fy SynonymsAntonymsEtymology Synonyms acetifyacidulatesour Antonyms alkalizesweetenOriginLATacidus→ENacidify From acid + -ify, from Latin acidus (“sour, acid”); compare French acidifier.