obscurity
     n 1: the quality of being unclear or abstruse and hard to
          understand [syn: {obscureness}, {abstruseness}, {reconditeness}]
          [ant: {clarity}]
     2: an obscure and unimportant standing; not well known; "he
        worked in obscurity for many years" [ant: {prominence}]
     3: the state of being indistinct or indefinite for lack of
        adequate illumination [syn: {obscureness}]
Source: WordNet® 2.0