单词	toughen
释义	tough·en (tŭfən) tr. & intr.v. tough·ened, tough·en·ing, tough·ens To make or become tough. See Synonyms at harden. toughen·er n.
随便看	catechism catechist catechistic catechistical catechization catechize catechizer catechol catecholamine catechu catechumen so what sown sow oats oats sow one's oats oats sow (one's) oats/wild oats sow one's wild oats sow thistle sow wild oats sox soy soya soybean Soyinka soymilk

英语词典包含135693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。