thaw

Short definition from Wiktionary

Verb

1. 1
   To gradually melt, dissolve, or become fluid; to soften from frozen.
2. 2
   To become sufficiently warm to melt ice and snow, said in reference to the weather.
3. 3
   To grow gentle or genial.
4. 4
   To gradually cause frozen things (such as earth, snow, ice) to melt, soften, or dissolve.

Noun

1. 1
   The melting of ice, snow, or other frozen or congealed matter; the transformation of ice or the like into the state of a fluid; liquefaction by heat of anything congealed by frost
2. 2
   a period of weather warm enough to melt that which is frozen
3. 3
   A period of relaxation, of reduced reserve, tension, or hostility or of increased friendliness or understanding.

Proper noun

1. 1
   A river in South Wales which flows into the Bristol Channel at Aberthaw.
2. 2
   A surname from Burmese.