Same word as cold:

Siberian, algid, arctic, below freezing, below zero, benumbed, biting, bitter, blasting, bleak, boreal, brisk, brumal, chill, chilled, cool, crisp, cutting, frigid, frore, frosty, frozen, gelid, glacial, have goose bumps, hawkish, hiemal, hyperborean, icebox, iced, icy, inclement, intense, keen, nipping, nippy, numbed, numbing, one-dog night, penetrating, piercing, polar, raw, rimy, severe, sharp, shivery, sleety, snappy, snowy, stinging, two-dog night, wintry