covert

Adjective

• (of a wife) being under the protection of her husband
  • a woman covert
    

• secret or hidden; not openly practiced or engaged in or shown or avowed
  • covert actions by the CIA
    
  • covert funding for the rebels
    

Noun

• a covering that serves to conceal or shelter something
  • 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
    

• a flock of coots

Related words

• Synonyms: 
  screen , cover , concealment
• Antonyms: 
  overt , open