照射|しょうしゃshousha[1]atamadaka (head-high)

Common
Definitions
  1. noun, suru verb, transitive verb, intransitive verbirradiation; radiation; beaming
  2. noun, suru verb, transitive verb, intransitive verbexposure (to light); illumination
Conjugation
Dictionary form照射する(しょうしゃする)
Polite (masu)照射します(しょうしゃします)
Negative (nai)照射しない(しょうしゃしない)
polite (masen)照射しません(しょうしゃしません)
classical zu / nu照射せず・照射せぬ(しょうしゃせず・しょうしゃせぬ)
Past (ta)照射した(しょうしゃした)
polite (mashita)照射しました(しょうしゃしました)
Past negative (nakatta)照射しなかった(しょうしゃしなかった)
polite (masen deshita)照射しませんでした(しょうしゃしませんでした)
Te form照射して(しょうしゃして)
Potential照射できる(しょうしゃできる)
Passive照射される(しょうしゃされる)
Causative照射させる(しょうしゃさせる)
Causative passive照射させられる(しょうしゃさせられる)
Conditional (ba)照射すれば(しょうしゃすれば)
tara照射したら(しょうしゃしたら)
Volitional照射しよう(しょうしゃしよう)
polite (mashou)照射しましょう(しょうしゃしましょう)
Imperative照射しろ(しょうしゃしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym照らすてらすNeutralMeans to illuminate, but also to compare against or refer to, as in 「規則に照らして」; broader in use than 「照射」, which is limited to directing light or rays.
  • Synonym照らし出すてらしだすNeutralA verb meaning to light up a dark place, also used figuratively for revealing the truth; it stresses the effect of illumination rather than the act of directing rays.
  • Related放射ほうしゃNeutralEmission spreading outward from a center in all directions; also radiation itself. It stresses outward dispersion, while 「照射」 stresses directing rays onto a target.
  • Antonym遮光しゃこうNeutralAn antonym: blocking light so it does not leak out or get in; the opposite of shining light on something.
  • Antonym遮蔽しゃへいNeutralAn antonym: covering or shielding something, e.g. blocking radiation; the opposite of exposing a target to rays.

Use 「照射」 for directing light or radiation onto an object, as in 「放射線照射」. To light something up say 「照らす」 (or 「照らし出す」 for the lighting effect); 「放射」 is for emitting in all directions. The opposites are 「遮光」 and 「遮蔽」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 日光にっこうなどが照てりつけること。
  2. 光線こうせんや放射線ほうしゃせんを当あてること。
Kanji in this word
English equivalents

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