febrile Antonyms

afebrile northern siberian sleety smarting snithy stinging stone-cold together serene septentrional self-possessed numb numbing peaceful piercing poised polar relaxed rimy tranquil unruffled wintery at ease bone-chilling cold as ice untroubled unflappable self-controlled unperturbed as cool as a cucumber northbound nippy undisturbed knifelike air-conditioned laid-back popsicle hiemal carefree hawkish extremely cold algid calm centered chill chilled chilling chilly circumpolar