Wiktionary
ungrudgingly
adv. Without a grudge.
WordNet
ungrudgingly
adv. in a generous and ungrudging manner; "he ungrudgingly agreed to pay for everybody's dinner when the guests found themselves without cash" [ant: grudgingly]
Usage examples of "ungrudgingly".
It heralded the arrival of Sherard Blaw, the dramatist who had discovered himself, and who had given so ungrudgingly of his discovery to the world.