The Collaborative International Dictionary of English v.0.48:
liquify \liquify\ v. t. & i. 1. Same as liquefy. Syn: Syn. --, make liquid, liquidize, liquidise, make fluid. [WordNet 1.5]WordNet (r) 3.0 (2006):
liquify v 1: make (a solid substance) liquid, as by heating; "liquefy the silver" [syn: liquefy, liquify, liquidize, liquidise] 2: become liquid or fluid when heated; "the frozen fat liquefied" [syn: liquefy, flux, liquify]