idiom
US /ˈɪd.i.əm/
UK /ˈɪd.i.əm/
1.
习语, 成语
a group of words established by usage as having a meaning not deducible from those of the individual words (e.g., rain cats and dogs, see the light).
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Learning English idioms can be challenging but rewarding.
学习英语习语可能具有挑战性，但很有意义。
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The phrase 'kick the bucket' is an idiom for dying.
“kick the bucket”这个短语是表示死亡的习语。