obscure

[1]	befog , becloud , obnubilate , haze over , fog , cloud , mist
[2]	confuse , blur , obnubilate
[3]	bedim , overcloud
[4]	blot out , obliterate , veil , hide
[5]	cover , conceal , hide , veil , shroud , cloak , mask , screen , disguise , keep from
[6]	dim , bedim , cloud , becloud , dull , shroud , shade , adumbrate , overshadow , darken , obfuscate , block , eclipse

adj.

[1]	dark , unlit , gloomy , sombre , dismal , murky , dusky , black , Cimmerian , tenebrous , dim , faint , blurred , veiled , shadowy , subfusc , subfuscous , umbral , shady , hazy , foggy , befogged , clouded , nebulous , overcast , cloudy
[2]	unclear , uncertain , ambiguous , vague , hazy , doubtful , dubious , equivocal , indefinite , indistinct , fuzzy , blurred , confused , confusing , Delphic , puzzling , enigmatic , perplexing , baffling , mystifying , mysterious , cryptic , incomprehensible , unfamiliar , foreign , strange
[3]	secret , concealed , hidden , remote , out-of-the-way , inconspicuous , unnoticeable , secluded , unnoticed
[4]	unknown , unheard-of , anonymous , unnamed , insignificant , unimportant , inconsequential , humble , lowly , mean , inglorious , inconspicuous , undistinguished , unnoticed , unsung , minor , little-known
[5]	abstruse , arcane , recondite , esoteric , intricate , complex , occult , out of the ordinary , unfamiliar , (Colloq) far-out
[6]	vague
[7]	dark
[8]	hidden
[9]	unknown , unsung
[10]	unnoticeable
[11]	apart , isolated