英语词汇mum-s the word的起源、历史背景-英语词源词典

词汇	mum-s the word
词源	mum’s the word. All sorts of theories have been offered for the origins of this term for “Keep quiet, don’t tell a soul,” but it probably resulted from the humming mum sound made when one speaks through closed lips. The expression probably dates back to Shakespeare’s day and he used a word something like it.
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英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。