resentfully adv 1: with resentment; in a resentful manner; "the best doctors would stay resentfully out of the national service, refusing to become the minions of a Minister"
Resentful \Re*sent"ful\ (-f?l), a. Inclined to resent; easily provoked to anger; irritable. -- {Re*sent"ful*ly}, adv. [1913 Webster]