"Frostily" is a word in ENGLISH

To roughen or sharpen, as the nail heads or calks of horseshoes, so as to fit them for frosty weather.

To expose to the effect of frost, or a frosty air; to blight or nip with frost.

State or quality of being frosty.

Covered with frost; as, the grass is frosty.

Attended with, or producing, frost; having power to congeal water; cold; freezing; as, a frosty night.

Appearing as if covered with hoarfrost; white; gray-haired; as, a frosty head.

Chill in affection; without warmth of affection or courage.

Pertaining to, resembling, or abounding in, ice; cold; frosty.

matúgnaw - Cold, fresh, raw, keen, chilly, cool, gelid, frigid, icy, bleak, frosty, freezing. (cf. túgnaw, mabúgnaw, malamíg).

Not of a quality to prevent communication, as by closing water ways, blocking roads, etc.; hence, not frosty or inclement; …

Frosty; covered with fine scales, hairs, dust, bloom, or the like, so as to give the appearance of frost.

Frosty; pruinose.

Abounding with rime; frosty.

Very trying to the feelings; piercing; keen; severe; painful; distressing; as, sharp pain, weather; a sharp and frosty air.