Siberian, algid, arctic, below zero, biting, bitter, bitterly cold, bleak, boreal, brisk, brumal, cold, cold as charity, cold as death, cold as ice, cold as marble, crisp, cutting, freezing, freezing cold, frigid, gelid, glacial, hibernal, hiemal, hyperborean, ice-cold, ice-encrusted, icelike, icy, inclement, keen, nipping, nippy, numbing, penetrating, piercing, pinching, raw, rigorous, severe, sharp, sleety, slushy, snappy, stone-cold, supercooled, winterbound, winterlike, wintery, wintry