thaw
Definitions
To pass or cause to pass from a frozen state to a liquid or soft state.
A period of warmer weather during which ice and snow melt.
To become less formal, reserved, or hostile in manner.
Examples
The frozen ground began to thaw as the spring sun warmed the earth.
We waited for the ice to thaw before we could safely drive across the bridge.
Diplomatic relations between the two countries started to thaw after the successful peace summit.