This change of phase is called freezing.
The name of the process is 'Melting'. It is that because the solid is melting into a liquid.
The name is freezing.
The process of a solid turning into a liquid is called "melting".
Melting...
The process of a liquid changing into a solid is called solidification or freezing.
The name of the process in which a solid changes directly into a gas is called sublimation.
freezing
melting
The name for solid water is ice. It changes to a liquid when it melts.
Dissolving?
The scientific name for conversion of liquid to solid is called "Freezing" or "solidification".
Either freezing or crystallization.