Answer: brisker

AnswerCrossword Clue
BRISKERMore stimulating.
BRISKERMore invigorating
BRISKERMore refreshing
briskerActive, fast, and energetic
briskerSharp or abrupt
brisker(of the weather or wind) Cold but fresh and enlivening
briskerBRISK, lively (full of energy)