covert (
http://definr.com/covert)
adj 1: secret or hidden; not openly practiced or engaged in or
shown or avowed; "covert actions by the CIA"; "covert
funding for the rebels" [ant:
overt]
2: (law) of a wife; under the protection of her husband
n 1: a flock of coots
2: a covering that serves to conceal or shelter something;
"they crouched behind the screen"; "under cover of
darkness" [syn:
screen,
cover,
concealment]