topienie

Topienie is a Polish noun meaning the process of melting, the transition of a solid into a liquid when heat is applied. It is derived from the verb topić, to melt, with the noun-forming suffix -enie.

In scientific contexts, topienie describes phase changes from solid to liquid. The related concept of the melting point (punkt topnienia) is the temperature at which a material begins to melt under given pressure. The process requires latent heat of fusion, the energy absorbed without a change in temperature during melting.

In everyday language, topienie is used to refer to the melting of snow and ice (topnienie śniegu) or of foods during cooking. In metallurgy and materials science, expressions such as topienie metali denote the melting of metals, as part of processes like casting.

Beyond its technical sense, Topienie may also appear as a proper noun, such as a place name or surname in Polish-speaking regions, though this article treats the term primarily as a linguistic and scientific concept.