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")
nebular, nebulous -- (of or relating to or resembling a nebula; "the nebular hypothesis of the origin of the solar system")
nebulous, unfixed -- (lacking definition or definite content; "nebulous reasons"; "unfixed as were her general notions of what men ought to be"- Jane Austen)
(Sound)
