thaw
verb
°To melt, dissolve, or become fluid; to soften; — said of that which is frozen; as, the ice thaws. Specifically by gradual warming.
°To become so warm as to melt ice and snow; — said in reference to the weather, and used impersonally.
noun
°The melting of ice, snow, or other congealed matter; the resolution of ice, or the like, into the state of a fluid; liquefaction by heat of anything congealed by frost.
°a warmth of weather sufficient to melt that which is congealed. —.