DictionarycovertSecret or hidden
adjective / noun

covert

KOH-vurt/ˈkəʊvɜːrt/

Concealed from ordinary view.

The woman keeps a covert watch on the meeting from behind a curtain.

A concealed observer behind a half-open curtain watching a meeting unnoticed; middle-aged white woman, no weapon.
Etymology

The French verb supplied a participle literally meaning “covered.” Something covered is screened from sight, giving the word its sense of hidden or secret.

In context

Forbidden Felix12:09
The Spanish Inquisition is famous for public trials and burnings. But most people don't know about the covert operatives the Inquisition employed to eliminate enemies who could not be prosecuted publicly.
10 Secret Assassin Cults Empires Tried To Erase From History

More examples

  • The agency conducts a covert investigation into the missing funds.
  • She casts a covert glance at her watch.
  • The rabbit disappears into a covert of thick brush.

Forms

covert · coverts

covertly adverb — In a secret or hidden manner.

Similar words

concealed
Emphasizes being kept out of sight rather than unacknowledged.
secret
Emphasizes restricted knowledge rather than physical concealment from view.