Source : Webster's Revised Unabridged Dictionary (1913)

Irreproachably \Ir`re*proach"a*bly\, adv.
   In an irreproachable manner; blamelessly.

Source : WordNet®

irreproachably
     adv : in an irreproachable and blameless manner; "she had lived
           blamelessly until she met this man" [syn: {blamelessly}]