toughened

able to withstand hardship, strain, or exposure a group of toughened mountain bikers barreling up the hill Synonyms cast-iron, hard, hard-bitten, hardened, inured, rugged, stout, strong, sturdy, tough, hardy, vigorousRelated Words flinty, leathery, resilient, stalwart; durable, enduring, everlasting, immortal, imperishable, lasting, permanent, stable, staunch (also stanch), staying, tenacious, unyielding; flourishing, prospering, thriving; able-bodied, brawny, muscular; fit, fortified, hale, healthy, husky, lusty, red-blooded, robust, sound, strapping, virile; annealed, seasoned, temperedNear Antonyms emasculated, enervated, enfeebled, exhausted, run-down, sapped, wasted, weakened, worn, worn out; crippled, debilitated, diseased, incapacitated, infirm, unsound; fragile, frail, puny; resistless, sensitive, susceptible, unresistant, vulnerable, yielding; mortal, perishable, temporary, transientAntonyms delicate, nonhardy, soft, tender, weak