溶融・熔融|ようゆうyouyuu[0]heiban (flat)
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Which spelling to use
溶融溶融 is the more common written form. Beginners should use it as their default when writing this word.
熔融熔融 is a less common written variant. Beginners should recognize it, but use 溶融 instead when choosing a form to write.
Definitions
- noun, suru verb, intransitive verbmelting; fusion
Conjugation
| Dictionary form | 溶融する（ようゆうする） |
|---|---|
| Polite (masu) | 溶融します（ようゆうします） |
| Negative (nai) | 溶融しない（ようゆうしない） |
| polite (masen) | 溶融しません（ようゆうしません） |
| classical zu / nu | 溶融せず・溶融せぬ（ようゆうせず・ようゆうせぬ） |
| Past (ta) | 溶融した（ようゆうした） |
| polite (mashita) | 溶融しました（ようゆうしました） |
| Past negative (nakatta) | 溶融しなかった（ようゆうしなかった） |
| polite (masen deshita) | 溶融しませんでした（ようゆうしませんでした） |
| Te form | 溶融して（ようゆうして） |
| Potential | 溶融できる（ようゆうできる） |
| Passive | 溶融される（ようゆうされる） |
| Causative | 溶融させる（ようゆうさせる） |
| Causative passive | 溶融させられる（ようゆうさせられる） |
| Conditional (ba) | 溶融すれば（ようゆうすれば） |
| tara | 溶融したら（ようゆうしたら） |
| Volitional | 溶融しよう（ようゆうしよう） |
| polite (mashou) | 溶融しましょう（ようゆうしましょう） |
| Imperative | 溶融しろ（ようゆうしろ） |
Common forms generated by rule; see the senses for honorific or irregular usage.
Synonyms & antonyms
- Synonym融解ゆうかいWrittenWritten physics term for the solid-to-liquid phase change, as in 「融解熱」; 「溶融」 leans toward high-temperature melting of metal and rock.
- Related溶かすとかすNeutralThe most general everyday transitive verb, as in 「砂糖を溶かす」; unlike 「溶融」 it is not limited to high temperatures.
- Related溶けるとけるNeutralThe most general everyday intransitive verb, as in 「氷が溶ける」; it does not stress high heat the way 「溶融」 does.
- Related解凍かいとうNeutralCovers thawing frozen food and, in computing, decompressing files; it is not used for high-temperature melting.
- Related熔けるとけるWrittenWritten verb used specifically for metal melting under heat; close in sense to 「溶融」 and leaning toward metallurgy.
- RelatedとろけるCasualColloquial for melting soft and gooey, as in 「チーズがとろける」; also used figuratively for being enraptured.
- Related溶化ようかWrittenWritten term for melting by heating; rarely used and somewhat old-fashioned technical vocabulary.
- Related蕩かすとろかすWrittenWritten word for melting steel, also figurative for melting someone's heart; literary in flavour.
- Related熔かすとかすWrittenWritten transitive verb for smelting metal, tied to metallurgical processes.
- Antonym凝固ぎょうこWrittenWritten term for solidification, the direct opposite of the melting 「溶融」 describes.
- Antonym固化こかWrittenWritten term for solidification, opposite of 「溶融」, with an engineering slant.
Everyday melting calls for 「溶ける」 or 「溶かす」. 「溶融」 is the technical term for melting metal or rock at high heat, as in 「炉心溶融」 and 「溶融炉」; 「融解」 names the physics phase change, 「凝固」 and 「固化」 are its opposites, and the remaining words are narrower, written, or figurative variants.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
English equivalents
