Dictionary 1. (v. t.) To convert into an acid; to sour\; as, to acidify sugar.2. (v. t.) To sour; to embitter. Thesaurus acetify acidulate alkalify alkalize borate carbonate catalyze chemical chlorinate electrolyze ferment homopolymerize hydrate hydrogenate hydroxylate isomerize nitrate oxidize pepsinate peroxidize phosphatize polymerize reduce sour sulfate sulfatize sulfonate turn sour work |