F0322900 (frĕt′fəl)adj.1. Inclined to be vexed or troubled; peevish.2. Marked by worry and distress; troublesome: "Of all the fretful stages of human development, adolescence is the most infamous"(David Gelman).fret′ful·ly adv.fret′ful·ness n.Thesaurus
Adv.
1.
fretfully - in a fretful manner; "fretfully, the baby tossed in his crib"