visible Antonyms

invisible lurk ultraviolet unseen vague withdrawn infrared unavailable back room backroom subterrestrial shrouded microcosmic mysterious obscure obscured occult occulted perdu secret behind-the-scenes lens cap ultramicroscopic unimagined unobservable unsolved untellable unthought-of as clear as mud cloak-and-sword top secret unseeable out of sight cagey camouflaged nonvisual unnoticeable clear as mud cloak-and-dagger undetectable in mind hidden from sight absent clad clandestine classified cloistered concealed covert dark