cov·ert
adjective/ˈkʌvət/, /ˈkəʊvɜːt/
/ˈkəʊvɜːrt/
(formal)- 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.
一切措施，无论是公开的还是秘密的，都是针对恐怖分子采取的。
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’. - covert operations/surveillance