融解

1. Origins, structure, and basic meaning

• Structure: 融解 (ゆうかい) is a noun that also forms a する verb for melting or fusion, the change of a solid into liquid.
• Basic usage: It describes timing ice as it melts or a solid beginning to melt as temperature rises.
  • 氷の融解に必要な時間を測った。 — We timed how long the ice took to melt.
  • 温度を上げると固体が融解し始めた。 — The solid began melting as the temperature rose.

2. Common pitfalls and similar expressions

• Melting and causing to melt
  • 融解する describes the solid itself changing state; in the example, raising the temperature supplies the condition for that change.