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	malodorousness malolactic malonate Malone malonic acid Malory maloti Malpighi Malpighian body Malpighian corpuscle Malpighian layer Malpighian tubule malposition malpractice malpractitioner Malraux MALS malt Malta Malta fever maltase malted milk Maltese Maltese cat Maltese cross

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。