音标：['tʌfn]
vt. (使)变坚韧, (使)变顽强
vi. (使)变坚韧, (使)变顽强
在线英汉词典

toughen的短语、例句：

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.