| 单词 | toughens | 
| 释义 | tough1 of 4adjective   ˈtəf    tougher; toughest   1   : difficult to accomplish, resolve, endure, or deal with  a tough question tough luck 2   : capable of enduring strain, hardship, or severe labor  tough soldiers 3   : unruly, rowdyish  started hanging out with the tough kids 4  a    : strong or firm in texture but flexible and not brittle    b    : not easily chewed  tough meat 5   : characterized by severity or uncompromising determination  tough laws tough disciplinesee also get tough on 6   : very hard to influence : stubborn  a tough negotiator 7   : stubbornly fought  a tough contest 8   : marked by absence of softness or sentimentality  a tough critic 9   : glutinous, sticky    toughly adverb  tough2 of 4 adverb  : in a tough manner (see tough entry 1)  talking tough tough3 of 4 noun  : a tough and violent person : rowdy   tough4 of 4 verb  toughed; toughing; toughs   transitive verb   : to bear unflinchingly : endure  —usually used with out especially in the phrase tough it out   toughens verb1 as in strengthensto increase the ability of (as a muscle) to exert physical force weight lifting will help toughen those flabby muscles of yours Synonyms & Similar Words Relevance 
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 2 as in hardensto make able to withstand physical hardship, strain, or exposure hiking every morning through snow and ice toughened him considerably Synonyms & Similar Words 
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 3 as in stiffensto make more harsh, uncompromising, or severe attempts to toughen conditions under which waivers from military service would be permitted Synonyms & Similar Words 
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