toughen'tʌfn英式朗读美式朗读基本解释v. (使)变坚韧, (使)变顽强英文释义v. make tough or tougher词形变化过去分词toughened过去式toughened第三人称单数toughens现在分词toughening上一个单词：toughed下一个单词：toughened