toughen

v [I, Ip, Tn, Tn.p] ~ (sth/sb) (up) (cause sth/sb to) become tough or tougher （使某事物[某人]）（更）坚韧, 坚强, 强硬: The law needs toughening (up). 需要加强法制的威力. * toughened glass 钢化玻璃.

tottery, toucan, touch, touch off, touch on, touch up, touch-and-go, touch-judge, touch-line, touch-type, touchdown, touche, touched, touchily, touchiness, touching, touchingly, touchy, tough, tough (also toughie / 5tQfI; `tQfI/), toughness, toupee, tour, tour de force, tourism, tourist, tourist class, tourist trap, tournament, tourniquet, tousle, tout, tow, tow-bar, tow-line, `tow-rope, tow-path, toward, toward(s), towards, towards the end of,