放射|ほうしゃhousha[0]heiban (flat)
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- noun, suru verb, transitive verbradiation; emission
Conjugation
| Dictionary form | 放射する(ほうしゃする) |
|---|---|
| Polite (masu) | 放射します(ほうしゃします) |
| Negative (nai) | 放射しない(ほうしゃしない) |
| polite (masen) | 放射しません(ほうしゃしません) |
| classical zu / nu | 放射せず・放射せぬ(ほうしゃせず・ほうしゃせぬ) |
| Past (ta) | 放射した(ほうしゃした) |
| polite (mashita) | 放射しました(ほうしゃしました) |
| Past negative (nakatta) | 放射しなかった(ほうしゃしなかった) |
| polite (masen deshita) | 放射しませんでした(ほうしゃしませんでした) |
| Te form | 放射して(ほうしゃして) |
| Potential | 放射できる(ほうしゃできる) |
| Passive | 放射される(ほうしゃされる) |
| Causative | 放射させる(ほうしゃさせる) |
| Causative passive | 放射させられる(ほうしゃさせられる) |
| Conditional (ba) | 放射すれば(ほうしゃすれば) |
| tara | 放射したら(ほうしゃしたら) |
| Volitional | 放射しよう(ほうしゃしよう) |
| polite (mashou) | 放射しましょう(ほうしゃしましょう) |
| Imperative | 放射しろ(ほうしゃしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonym発散はっさんNeutralNoun for letting something disperse outward or venting feelings, as in 「ストレス発散」.
- Synonym放出ほうしゅつNeutralNoun for release or discharge, as in 「エネルギーの放出」; general letting-out, not specifically radiation.
- Synonym輻射ふくしゃNeutralNoun for radiation; still seen in set phrases like 「輻射熱」, but 「放射」 is the usual choice in general contexts.
- Related放射線ほうしゃせんNeutralRefers to the rays themselves, as in 「放射線治療」; the emphasis is on the radiation emitted, not the act of emitting.
- Related放射能ほうしゃのうNeutralThe ability or property of emitting radiation, as in 「放射能を持つ」; in loose usage also the radioactive material itself, as in 「放射能汚染」.
- Related照射しょうしゃNeutralNoun for irradiation, as in 「レーザー照射」; the emphasis is on aiming rays at a target.
- Related放散ほうさんWrittenWritten word for giving off or diffusing something, as in 「熱の放散」; rare.
- Antonym吸収きゅうしゅうNeutralAbsorption — taking something in; the opposite of 「放射」.
Use 「放射」 for light, heat or electromagnetic waves given off from a center in all directions (「放射状」, 「放射冷却」). The rays themselves are 「放射線」, the property of emitting them 「放射能」, and aimed beams 「照射」; 「吸収」 is the opposite.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


