The Collaborative International Dictionary of English v.0.48:
Unflagging \Unflagging\ See flagging.WordNet (r) 3.0 (2006):
unflagging adj 1: showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence" [syn: indefatigable, tireless, unflagging, unwearying] 2: unceasing; "unfailing loyalty"; "unfailing good spirits"; "unflagging courtesy" [syn: unfailing, unflagging]