Source : Webster's Revised Unabridged Dictionary (1913)

Unwitting \Un*wit"ting\, a.
   Not knowing; unconscious; ignorant. -- {Un*wit"ting*ly}, adv.

Source : WordNet®

unwittingly
     adv : without knowledge or intention; "he unwittingly deleted the
           references" [syn: {inadvertently}, {unknowingly}] [ant:
            {mindfully}, {wittingly}, {wittingly}]