| Harden 1. (v. t.) To make hard or harder; to make firm or compact; to indurate; as, to harden clay or iron. 2. (v. t.) To accustom by labor or suffering to endure with constancy; to strengthen; to stiffen; to inure; also, to confirm in wickedness or shame; to make unimpressionable. 3. (v. i.) To become hard or harder; to acquire solidity, or more compactness; as, mortar hardens by drying. 4. (v. i.) To become confirmed or strengthened, in either a good or a bad sense. Thesaurus Entries acclimate, acclimatize, accommodate, accustom, adapt, adjust, anneal, be tough, beef up, brace, brace up, break, break in, brutalize, buttress, cake, calcify, callous, case harden, caseharden, compact, concrete, condition, confirm, conform, congeal, consolidate, cornify, crystallize, densify, domesticate, domesticize, dry, endure, establish, familiarize, firm, fix, fortify, fossilize, freeze, gentle, gird, habituate, hang tough, housebreak, indurate, intensify, inure, invigorate, lapidify, lithify, naturalize, nerve, orient, orientate, ossify, petrify, prop, refresh, reinforce, reinvigorate, restrengthen, season, set, shore up, solidify, steel, stiffen, strengthen, support, sustain, tame, temper, toughen, train, turn to stone, undergird, vitrify, wont |