glacially

adjective

1. of or like ice or glaciers
2. of or produced by a glacier or a glacial epoch or period
3. freezing; frigid: glacial weather
4. cold and unfriendly: a glacial stare
5. as slow as the movement of a glacier: glacial progress
6. Chem. having an icelike, crystalline appearance

Origin: L glacialis, icy, frozen < glacies, ice < IE *glag-, partial redupl. of base *gel-, to freeze > cold