covert

Từ điển Oxford Advanced Learner 8th

cov·ert [covert coverts] adjective, noun
adjective BrE [ˈkʌvət] ; [ˈkəʊvɜːt] ; NAmE [ˈkoʊvɜːrt] (formal)
secret or hidden, making it difficult to notice
•covert operations/surveillance
•He stole a covert glance at her across the table.
•Every measure, both overt and covert, is being taken against terrorists.
compare ↑overt

Word Origin:
Middle 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’.

Example Bank:
•There were widespread allegations of the use of covert surveillance.
Derived Word: ↑covertly
 
noun BrE [ˈkʌvət] ; NAmE [ˈkʌvərt]
an area of thick low bushes and trees where animals can hide

Word Origin:
Middle 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’.
 

• Từ đồng nghĩa / Synonyms:
  screen, cover, concealment
• Từ trái nghĩa / Antonyms:
  overt, open