harden Antonyms

soften be intolerant loosen liquidize liquefy liquate indulge fuse fluidize flourish fight expand evolve etiolate melt sensitize light a fire be successful be against defrost melt down unthaw liquify weaken thaw thawing spoil smelt enlarge enfeeble contest confront combust combat colliquate check challenge burgeon buffer blossom bloom attrition contradict controvert counter enervate dissolve dissent dispute disapprove