A solute
The liquid that dissolves a solid is called the "Solvent".
Freezing
solidification
This phenomenon is called dissolution; a solution is obtained (the solution is a type of homogeneous mixture).
The process in which a liquid is turned to a solid is called "freezing".
melting
Soild
Toothpaste is a liquid.
Liquid.
This substance is called a solute.
This substance is called a solute.
WATER! If you put water in a cup and leave it in the freezer it will turn to an ice cube then if you leave it somewhere warm and cosy it will turn back to a liquid again. Try it for yourself even.