Answer: glacial

AnswerCrossword Clue
GLACIALNot just slow
glacialRelating to, resulting from, or denoting the presence or agency of ice, esp. in the form of glaciers
glacialDenoting pure organic acids (esp. acetic acid) that form icelike crystals on freezing
glacialExtremely cold
glacialOf ice; icy
glacialExtremely slow (like the movement of a glacier)
glacialan ice age
GLACIALPainfully slow
GLACIALIcy
GLACIALFrigid
GLACIALBeyond slow
GLACIALBitterly cold
GLACIALChilling
GLACIALPertaining to ice floes.
GLACIALFreezing cold.
GLACIALCold and hard.
GLACIALCold as ice.
GLACIALDescribing the Pleistocene epoch.
GLACIALReally slow
GLACIALSnail-like
GLACIALLike ice sheets and bergs