toughen

verb

1 toughen

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Moby thesaurus: acclimate, acclimatize, anneal, be tough, beef up, brace, brace up, buttress, calcify, callous, case harden, confirm, cornify, develop, endure, firm, fortify, fossilize, gird, hang tough, harden, indurate, invigorate, lapidify, lithify, nerve, ossify, petrify, prop, refresh, reinforce, reinvigorate, restrengthen, season, shore up, steel, stiffen, strengthen, support, sustain, temper, undergird, vitrify ... show more.

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