tough as nails

Main Entry:
tough [tuhf]
Part of Speech: adjective
Definition: sturdy, strong
Synonyms: brawny, cohesive, conditioned, dense, durable, fibrous, firm, fit, flinty, hard, hard as nails, hard-bitten, hardened, hardy, healthy, indigestible, inflexible, leathery, lusty, mighty, molded, resilient, resistant, rigid, robust, rugged, seasoned, sinewy, solid, stalwart, steeled, stiff, stout, strapping, tenacious, tight, tough as nails, unbreakable, unyielding, vigorous, withstanding
Antonyms: delicate, fragile, unstable, vulnerable, weak, wobbly
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