Thaw
Part of speech: noun
Definition: 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. —w:Dryden.
Part of speech: verb
Definition: 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. To grow gentle or genial. To cause frozen things (such as earth, snow, ice) to melt, soften, or dissolve. Specifically by gradual warming.
Melt
Part of speech: noun
Definition: molten material, the product of melting.The transition of matter from a solid state to a liquid stateThe springtime snow runoff in mountain regions.A melt sandwich.
Part of speech: verb
Definition: To transit (or to change) the matter from a solid state to a liquid state, usually by a gradual heat.To change gradually (or to become transited) from a solid state to a liquid state; to be meltedTo dissolve, disperse, vanish.To be very hot and sweat profusely.
Example sentence: She looked as if butter wouldn't melt in her mouth - or anywhere else.