How do you unfreeze?

Answer 1

To thaw something out, you place it in an environment where the temperature is above freezing.. depending on how quickly you want it to thaw, you could leave it at room temperature, place it in a refrigerator, or put it in lukewarm to warm water.

If you're thawing out a body extremity, such as fingers, you place the fingers under cold water, and gradually increase the water temperature.