covert
Translation
covert, secret, concealed
Examples
They planned a covert operation.
They planned a covert operation.
He gave a covert glance at his watch.
He gave a covert glance at his watch.
Grammar Patterns
((a covert sth.)) a covert (noun) They planned a covert operation.
Similar Words
Synonyms: secret, clandestine, stealthy; Antonyms: overt, open
Etymology
From Old French 'covert', past participle of 'covrir' (to cover). It literally means 'covered'.
Memory Tips
'Covert' sounds like 'covered'. A covert operation is 'covered' up and kept secret.