covert

(noun) a flock of coots.

(noun) a covering that serves to conceal or shelter something. Synonyms: screen, cover, concealment. Examples: "A screen of trees afforded privacy." "Under cover of darkness." "The brush provided a covert for game." "The simplest concealment is to match perfectly the color of the background."

(adj) secret or hidden; not openly practiced or engaged in or shown or avowed. Synonyms: covert (vs. overt). Examples: "Covert actions by the cia." "Covert funding for the rebels."

(adj) (of a wife) being under the protection of her husband. Example: "A woman covert."