(a.) Snappish.

Siberian active activist activistic acute aggressive agile algid alive animated arctic below zero biting bitter bitterly cold bleak boreal bouncing bouncy breakneck breezy brisk brumal bubbly burning chic chipper classy cold cold as charity cold as death cold as ice cold as marble crisp curried cutting dapper dashing disagreeable double-quick dynamic eagle-winged ebullient effervescent energetic enterprising enthusiastic expeditious express fashionable fast fleet flying forceful forcible fractious freezing freezing cold frigid frisky full of go full of life full of pep galloping gelid glacial go-go hair-trigger hasty headlong hearty hibernal hiemal high-seasoned hot hot as pepper huffy hustling hyperborean ice-cold ice-encrusted icelike icy impetuous incisive inclement intense keen kinetic light of heel light-footed live lively living lusty mercurial mettlesome militant modish natty nimble nimble-footed nipping nippy numbing penetrating peppery peppy perky pert petulant piercing pinching piquant poignant precipitate prompt quick quick as lightning quick as thought quicksilver racy rapid raspy raw ready reckless rigorous robust running seasoned severe sharp sleety slushy smacking smart snappish spanking speedy spiced spicy spirited sprightly spry stone-cold strenuous strong stylish subzero supercooled swank swift swish take-charge take-over tangy tony trenchant trendy trig vibrant vigorous vivacious vivid winged winterbound winterlike wintery wintry with a kick zestful zesty zingy zippy