(ゆうかい)

ゆうかい
noun, suru verb
melting; fusion
1. melting; fusion
the process of a solid becoming liquid through the application of heat
(こおり)融解(ゆうかい)して(みず)になる。
Ice melts and becomes water.
金属(きんぞく)融解(ゆうかい)(てん)物質(ぶっしつ)によって(こと)なる。
The melting point of metals varies by substance.
地球温暖化(ちきゅうおんだんか)永久凍土(えいきゅうとうど)融解(ゆうかい)(すす)んでいる。
The melting of permafrost is progressing due to global warming.

FORMATION:
(ゆう) (dissolve, melt) + (かい) (dissolve, undo) → melting/dissolving

VERB FORM:
融解(ゆうかい)する (to melt, to fuse)

SCIENTIFIC TERMS:

  • 融解(ゆうかい)(てん) (melting point)
  • 融解(ゆうかい)(ねつ) (heat of fusion)

RELATED WORDS:

  • 溶解(ようかい) (dissolution - dissolving in a liquid)
  • 凝固(ぎょうこ) (solidification - antonym)
  • 蒸発(じょうはつ) (evaporation)
  • 凝縮(ぎょうしゅく) (condensation)

NOTE:
融解(ゆうかい) refers specifically to the phase change from solid to liquid, while 溶解(ようかい) refers to dissolving a substance in a solvent.