secret or hidden, making it difficult to notice 秘密的;隐蔽的;暗中的 covert operations/surveillance 暗中活动/监视 He stole a covert glance at her across the table. 他隔着桌子偷偷地瞥了她一眼。 Every measure, both overt and covert, is being taken against terrorists. 对恐怖分子采取了公开和秘密的一切措施。
Oxford Collocations DictionaryCovert is used with these nouns:- action
- agent
- glance
- …
Word OriginMiddle English (in the general senses ‘covered’ and ‘a cover’): from Old French, ‘covered’, past participle of covrir, from Latin cooperire, from co- (expressing intensive force) + operire ‘to cover’.