cloudy, nebulose, nebulous -- (lacking definite form or limits; "gropes among cloudy issues toward a feeble conclusion"- H.T.Moore; "nebulous distinction between pride and conceit")
cloudy -- (full of or covered with clouds; "cloudy skies")
cloudy, muddy, mirky, murky, turbid -- ((of liquids) clouded as with sediment; "a cloudy liquid"; "muddy coffee"; "murky waters")