tough

жестко имя прилагательное:

жесткий (hard, tough, rigid, stiff, harsh, rough)

трудный (difficult, hard, tight, tough, arduous, troublesome)

тяжелый (heavy, hard, severe, difficult, heavyweight, tough)

крутой (steep, abrupt, tough, sharp, precipitous, drastic)

грубый (rude, rough, gross, coarse, brute, tough)

крепкий (strong, hard, sturdy, solid, robust, tough)

прочный (lasting, strong, solid, durable, rugged, tough)

сильный (strong, keen, powerful, Heavy, severe, tough)

твердый (solid, fixed, hard, firm, strong, tough)

вязкий (viscous, ductile, tough, viscid, pasty, slimy)

плотный (dense, tight, thick, solid, close, tough)

выносливый (hardy, enduring, tough, strong, everlasting, wiry)

стойкий (persistent, resistant, stable, steadfast, enduring, tough)

тугой (tight, stiff, tough, tense, taught)

упорный (persistent, stubborn, hard, refractory, rebellious, tough)

упругий (elastic, resilient, springy, bouncy, spring, tough)

хулиганский (tough, ruffian, ruffianly)

несгибаемый (inflexible, unyielding, tough, adamant, die-hard, hard-bitten)

бандитский (tough)

закоренелый (ingrained, inveteracy, engrained, confirmed, old, tough)

преступный (criminal, felonious, guilty, maleficent, culpable, tough)

жизнестойкий (tough)

неисправимый (incorrigible, hopeless, irredeemable, remediless, irreclaimable, tough)

полный лишений (tough)

наречие:

жестко (hard, tough)

грубо (rough, roughly, rudely, grossly, tough, coarsely)

имя существительное:

хулиган (bully, hooligan, hoodlum, rowdy, ruffian, tough)

бандит (bandit, gangster, thug, gunman, mobster, tough)

глагол:

выдерживать (withstand, stand, survive, support, sustain, tough)