- -fy ► SUFFIX 1) (added to nouns) forming verbs denoting making or producing: speechify. 2) denoting transformation or the process of making into: petrify. 3) forming verbs denoting the making of a state defined by an adjective: falsify. 4) forming verbs expressing a causative sense: horrify.ORIGIN from Latin -ficare, from facere 'do, make' .
English terms dictionary. 2015.