Usually pronounced /'ɪm-/ before an unstressed syllable, and /ɪm-/ before a stressed syllable. 通常在非重读音节前重读,在重读音节前作弱读。
PREFIX (用于以 m, p 或 b 开头的单词前,构成反义词）表示“不”，“无”，“非” Im- is added to words that begin with 'm', 'p', or 'b' to form words with the opposite meaning. (用于以 m, p 或 b 开头的单词前,构成反义词）表示“不”，“无”，“非”
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He implied that we were emotionally immature.
他暗示我们情感上还不成熟。
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Don't stare at me — it's impolite!.
别盯着我看—这是不礼貌的！
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The illness is triggered by a chemical imbalance in the brain.
这种疾病是大脑化学物质失衡诱发的。