Answer: perkup

AnswerCrossword Clue
PERKUP

Come out of a funk

PERKUP

Show sudden interest

PERKUP

Lose the blues

PERKUP
Come to life
PERKUP
Brighten
PERKUPFreshen.
PERKUPRefresh
PERKUPOpposite of "nod off"
PERKUPGet excited
PERKUPEnliven
PERKUPBecome attentive