mask

🇬🇧/mɑːsk/ 🇺🇸/mæsk/📚 8449 68 3四级六级考研托福雅思高考
A mask is a piece of cloth or other material, which you wear over your face so that people cannot see who you are, or so that you look like someone or something else. 面具

noun [专属名词]面罩,口罩;防毒面具,呼吸面罩;面膜;假面具,假面;伪装,掩饰;表情,面容;遮盖物,遮蔽物;(古希腊和罗马演员佩戴的)人头面具;遮光板,遮光片;(制造微电路用)模板;(蜻蜓幼虫)脸盖

A mask is a piece of cloth or other material that you wear over all or part of your face to protect you from germs or harmful substances.
防护面具

verb [vt. 及物动词]掩饰,伪装,隐瞒;盖住(气味、味道、声音等);遮盖;戴面具

If you mask your feelings, you deliberately do not show them in your behaviour, so that people cannot know what you really feel.
掩饰

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