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