toughen up

短语

发音

AU

词形变化

toughened up toughening up toughens up 三单 toughens up toughening up 现在分词 toughened up 过去式 toughened up 过去分词

释义与例句

v.
  1. 1.

    To make or become mentally tougher.

    及物/不及物 习语