covert

The Kulahu strike was part of a widening covert war being waged by Iran inside Pakistan.

The remote controlled flying craft has gone from covert military ops to a communal backyard hobby.

He and his followers have become really good at keeping their communications covert.

PARIS, France—What could be more cynical than a covert operation?

Syrian rebels have overtaken a joint Russian-Syrian secret facility that they claim was a covert intelligence collection base.

She saw a covert smile on his wrinkled face, while his wife pushed her former inquiry.

To-day they wore light covert coats over their canvas and rubber.

A thick wood skirted the meadow-land in another direction; but they could not have gained that covert for the same reason.

Fetherston raised his eyes and shot a covert glance at her—a glance of distinct suspicion.

Their deeper recesses were given up to owls and bats, and nearer the entrance the prowling fox or jackal found a covert.