be in disguise
表示处于伪装状态，常作表语。
The spy was in disguise.
间谍伪装了。
伪装物；乔装打扮
伪装；假扮；假象；表象；用于改变外貌以隐藏身份或冒充他人的物品(如服装、化妆品、假发)。；掩盖真实性质的外在表现；掩盖内在真相的外表。
clothing, makeup, or other materials worn to hide one's identity or change one's appearance
用于改变外貌以隐藏身份或冒充他人的物品(如服装、化妆品、假发)。
Material (such as clothing, makeup, a wig) used to alter one’s visual appearance in order to hide one's identity or assume another.
掩盖真实性质的外在表现
an outward semblance that misrepresents the true nature of something
掩盖内在真相的外表。
The appearance of something on the outside which masks what’s beneath.
改变外貌以隐藏身份的服装
any attire that modifies the appearance in order to conceal the wearer's identity
伪装的行为或状态,尤指作为计谋。
The act or state of disguising, notably as a ploy.
通过改变外观来隐藏身份的行为
the act of concealing the identity of something by modifying its appearance
He wore a disguise to the party so no one would recognize him.
他戴着伪装参加派对，这样没人会认出他来。
用法提示：名词，意为“伪装”，指改变外貌的装扮。
AI contextual example
Her cheerful mood was just a disguise for her sadness.
她愉快的情绪只是她悲伤的伪装。
用法提示：名词，意为“假象”，掩盖真实情感。
AI contextual example
The spy adopted several disguises during the mission.
间谍在任务中采用了多种伪装。
用法提示：名词复数，意为“多种伪装”。
AI contextual example
表示处于伪装状态，常作表语。
The spy was in disguise.
间谍伪装了。
表示穿戴伪装物，常用搭配。
She wore a disguise to the party.
她戴了伪装去参加派对。
后接as说明伪装成的身份。
He adopted a disguise as a janitor.
他伪装成清洁工。
多用于 under the guise of 等结构，指为掩盖真实意图而摆出的外表或名义，语气偏书面正式，强调“借……之名”。
侧重故意装出的样子或用作借口的说法，常与 under/on the pretense of 搭配，强调行为上的假装，不一定是穿戴上的改变。
既可指实物面具，也可指掩盖真实情感或意图的外表，比 disguise 更突出“遮盖物”本身。
本义指军事或动物保护色的伪装，引申为掩饰外表或行为，比 disguise 更具体、更中性。
grammar · medium
易错句子He was under disguise.
正确表达He was in disguise.
中文学习者常将“在伪装下”直译为“under disguise”，但英语固定搭配用“in disguise”表示伪装的状态。
grammar · medium
易错句子He put a disguise before entering.
正确表达He put on a disguise before entering.
动词短语“put on”表示“穿上、戴上”，这里“on”不可省略；中文可能直接说“放置伪装”，导致遗漏介词。
针对“通过改变外貌隐藏身份”这一义：disguise 指用服饰、化妆品等手段掩盖真实身份或冒充他人，unmasking 指揭去这层掩盖、使真实身份显露，语义方向相反。二者同为名词，但 unmasking 只表示揭露的动作或结果，不指所穿戴的伪装物本身，因此不能与 disguise 互换。
针对“掩盖真实性质的外在表现、隐藏身份的行为”这一义：disguise 是让真相不外露的掩饰，exposure 是真相被人发现或公之于众，二者构成对立。区别在于 exposure 侧重被揭露的状态或事实，disguise 侧重起掩饰作用的外表或行为，语义并不等同。
针对“掩盖真实性质的假象、表象”这一义：disguise 指与真实情况不符、用来误导他人的外在表象，reality 指事物本来的真实面目，语义相反。注意这只是较宽泛的语义对照，reality 并不指某件具体的伪装穿戴物。
disguise 强调隐瞒身份，camouflage 强调融入环境或军事隐蔽
disguise 可指整体装扮，mask 特指面部遮挡物
disguise 常指故意改变外表，guise 指通常的外表或假象，不一定有欺骗意图
假扮的；伪装的
The prince went in disguise to the ball.
王子假扮去参加舞会。
穿着伪装；乔装
He wore a disguise to avoid recognition.
他身穿伪装以避免被认出。
识破某人的伪装
The detective saw through the criminal's disguise.
侦探识破了罪犯的伪装。
乔装打扮；戴上伪装
She put on a disguise to sneak out.
她乔装打扮偷偷溜了出去。
薄弱的伪装
His smile was a thin disguise for his anger.
他的微笑是他愤怒的薄弱伪装。
采用伪装
The spy adopted a disguise to enter the building.
间谍采用伪装进入大楼。
dis- + agree
guise
因祸得福
Losing that job was a blessing in disguise because it pushed me to start my own business.
丢掉那份工作其实是因祸得福，因为它促使我开始了自己的事业。
伪装，乔装打扮
The prince went among the people in disguise to learn about their troubles.
王子乔装打扮混入人群，了解他们的疾苦。
掩盖真相
She tried to disguise the truth by changing the subject, but everyone knew she was lying.
她试图通过转移话题来掩盖真相，但人人都知道她在撒谎。
因祸得福。
Losing that job was a blessing in disguise because it forced me to start my own business.
失去那份工作因祸得福，因为它迫使我创办了自己的企业。
伪装，我明白了，你是一种邪恶。
The spy's disguise was so good that no one suspected his true intentions.
这个间谍的伪装如此巧妙，以至于没有人怀疑他的真实意图。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.