toughened ˈtʌfnd
释义
v. (使某物[人])坚韧, 坚强, 强硬( toughen的过去式和过去分词 )
英文释义
v make tough or tougher
a physically toughened
a made hard or flexible or resilient especially by heat treatment
词形变化
原型: toughen 原型变体: dp 过去式: toughened 过去分词: toughened
BNC词频排名: 33,634 | 当代语料库词频排名: 41,221