Source : Webster's Revised Unabridged Dictionary (1913)

Befittingly \Be*fit"ting*ly\, adv.
   In a befitting manner; suitably.

Source : WordNet®

befittingly
     adv : in an appropriate manner; "he was appropriately dressed"
           [syn: {appropriately}, {suitably}, {fittingly}, {fitly}]
           [ant: {inappropriately}, {inappropriately}]