The suffix group -fy , -ify , -efy forms verbs from primarily Latin bases. When -ify attaches to an English base, the base is an adjective (uglify, Frenchify) or noun (citify, zombify) usually having one syllable or two syllables ending in |i|. Verbs ending in -fy have corresponding noun forms ending in -ion: as a rule, -ify becomes -ification (verify , verification); -efy becomes -efaction (putrefy, putrefaction). See also fac, fic, fec, fact, fect.