The Collaborative International Dictionary of English v.0.48:
Befittingly \Be*fit"ting*ly\, adv. In a befitting manner; suitably. [1913 Webster]WordNet (r) 3.0 (2006):
befittingly adv 1: in an appropriate manner; "he was appropriately dressed" [syn: appropriately, suitably, fittingly, befittingly, fitly] [ant: inappropriately, unsuitably]