Of or pertaining to darkness or night; inconspicuous to the sight; indistinctly seen; hidden; retired; remote from observation; unnoticed.

Not easily understood; not clear or legible; abstruse or incomprehensible; as, an obscure passage or inscription.

make obscure or unclear; "The distinction was obscured"

not clearly understood or expressed; "an obscure turn of phrase"; "an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard; "their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin; "vague...forms of speech...have so long passed for mysteries of science"- John Locke