| 单词 | Verb Endings for toughen |
| 释义 | Verb Endings for toughen Verb Endings for toughen present simple:I toughenyou toughenhe/she/it toughenswe toughenthey toughenpresent participle: tougheningpast simple: toughenedpast participle: toughened |
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英语词典包含67674条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。