glacial

adjective

pertaining to glaciers
extremely slow
of, relating to, or being any of those parts of geologic time from Precambrian onward when a much larger portion of the earth was covered by glaciers than at present
devoid of warmth and cordiality
extremely cold : frigid
coldly imperturbable
of a purity marked by the tendency to readily solidify in the form of ice-like crystals

noun