obscure
adjective
1 he was born about 1650 though his origins and parentage remain obscure:
unclear, uncertain, unknown, in doubt, doubtful, dubious, mysterious, hazy, vague, indeterminate, concealed, hidden.
2 obscure references to Proust:
abstruse, recondite, arcane, esoteric, recherché, occult;
enigmatic, mystifying, puzzling, perplexing, baffling, ambiguous, cryptic, equivocal, Delphic, oracular, riddling, oblique, opaque, elliptical, unintelligible, uninterpretable, incomprehensible, impenetrable, unfathomable, inexplicable;
unexplained;
informal as clear as mud.
▷antonyms clear, plain.
3 an obscure Peruvian painter:
little known, unknown, unheard of, undistinguished, insignificant, unimportant, inconsequential, inconspicuous, unnoticed, nameless, anonymous, minor, humble, lowly, unrenowned, unsung, unrecognized, unhonoured, inglorious, forgotten.
▷antonyms famous, renowned.
4 grey and obscure on the horizon rose a low island | the far end of the room was obscure:
indistinct, faint, vague, ill-defined, unclear, blurred, blurry, misty, hazy, foggy, veiled, cloudy, clouded, nebulous, fuzzy;
dark, dim, unlit, black, murky, sombre, gloomy, shady, shadowy;
literary dusky, tenebrous, darkling, crepuscular;
rare caliginous, Cimmerian.
▷antonyms distinct.
obscure Oxford Dictionary of English