adj. 25B6; adjective
a frosty morning : FREEZING, cold, icy-cold, bitter, bitterly cold, chill, wintry, frigid, glacial, arctic; frozen, icy, gelid; informal nippy; Brit. informal parky; poetic/literary frore, rimy.
her frosty gaze : COLD, frigid, icy, glacial, unfriendly, inhospitable, unwelcoming, forbidding, hostile, stony, stern, hard.