covert
/ˈkəʊvəːt/adjective
Secret or hidden, especially when done by governments, police, or spies.
Example sentences
- “The agency ran a covert operation inside the country.”
- “She gave him a covert glance across the room.”
- “Journalists exposed a covert campaign to influence voters.”
The opposite is 'overt', meaning done openly. Pronounced KOH-vert or koh-VURT; the adverb is 'covertly'.