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mum n.(儿语)妈妈；沉默 a.沉默的

释义2： mum
/ mQm /

mum¹
◙ noun
1. [Brit. informal] one's mother
• [英，非正式] 妈妈

【语源】

1. mid 17th cent.: abbreviation of mummy

mum²
◙ adjective

【IDIOMS】

◘ keep mum
1. [informal] remain silent, especially so as not to reveal a secret
• [非正式] （尤指为保密）保持沉默，守口如瓶
»he was keeping mum about a possible move to West Ham.
他对可能搬到西哈姆一事不发一言。
◘ mum's the word
1. [informal] (as a request or warning) say nothing; don't reveal a secret
• [非正式] ［用作要求或警告］别声张；不要泄密

【语源】

1. late Middle English: imitative of a sound made with closed lips

mum³
◙ (mummed, mumming)
1. [no obj.] act in a traditional masked mime or a mummers' play
• 在传统假面哑剧中扮演（角色）；在英格兰民俗剧中扮演（角色）

【语源】

1. late Middle English: compare with mum and Middle Low German mummen