perkier|perkiest'pɜrkɪ /pɜːk- adj. +characterized by liveliness and lightheartedness
Thesaurus Dictionary
adj.
lively, cheery, cheerful, jaunty, bouncy, bright, invigorated, vigorous, vitalized, peppy, spirited, sprightly, frisky, animated, vivacious, effervescent, bubbly, buoyant, gay, Colloq bright-eyed and bushy-tailed, full of pep:
Sue's been quite perky since she started going with Trevor.
Advanced English Dictionary
+adjective (perkier, perkiest) (informal) cheerful and full of energy: She hasn't been her usual perky self lately. perkiness noun [U]
Random quote: Knowledge has three degrees: opinion, science, illumination. The means or instrument of the first is sense; of the second, dialectic; of the third, intuition.: Plotinus