逸する・佚する|いっするissuru[0]heiban (flat)
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Which spelling to use
逸する逸する（いっする） is the most common and standard written form; beginners should use it when writing this word.
佚する佚する（いっする） is a rarely used written variant, so you will seldom encounter it and generally need only recognize it.
Definitions
- suru verb (irregular), transitive verbto lose (a chance); to miss (a chance)
- suru verb (irregular), transitive verbto overlook; to omit; to forget
- suru verb (irregular), transitive verbto deviate
Conjugation
| Dictionary form | 逸する（いっする） |
|---|---|
| Polite (masu) | 逸します（いっします） |
| Negative (nai) | 逸しない（いっしない） |
| polite (masen) | 逸しません（いっしません） |
| classical zu / nu | 逸せず・逸せぬ（いっせず・いっせぬ） |
| Past (ta) | 逸した（いっした） |
| polite (mashita) | 逸しました（いっしました） |
| Past negative (nakatta) | 逸しなかった（いっしなかった） |
| polite (masen deshita) | 逸しませんでした（いっしませんでした） |
| Te form | 逸して（いっして） |
| Potential | 逸できる（いっできる） |
| Passive | 逸される（いっされる） |
| Causative | 逸させる（いっさせる） |
| Causative passive | 逸させられる（いっさせられる） |
| Conditional (ba) | 逸すれば（いっすれば） |
| tara | 逸したら（いっしたら） |
| Volitional | 逸しよう（いっしよう） |
| polite (mashou) | 逸しましょう（いっしましょう） |
| Imperative | 逸しろ（いっしろ） |
Common forms generated by rule; see the senses for honorific or irregular usage.
Synonyms & antonyms
- Synonym失するしっするWrittenWritten-style verb for losing something, often with abstract nouns; also means being excessive, as in 「遅きに失する」.
- Synonym逃すのがすNeutralTo miss or let something get away; common in speech, as in 「チャンスを逃す」.
- SynonymそれるNeutralVerb for getting separated from companions or missing one's chance, as in 「食いっぱぐれる」.
- Synonym失ううしなうNeutralThe broadest verb for losing something; 「逸する」 is more written and centers on missing chances or straying from the norm.
- RelatedなくすNeutralEveryday verb for losing or eliminating something; focuses on an object being gone.
- Related紛失ふんしつWrittenWritten noun for losing an item, common in formal prose; covers concrete objects, while 「逸する」 usually takes abstract things like chances.
- Related喪失そうしつWrittenLoss of something one had, as in 「記憶喪失」「権利喪失」; stresses losing what you already had, while 「逸する」 stresses missing out.
- RelatedはぐれるNeutralVerb for getting separated from companions or missing one's chance, as in 「食いっぱぐれる」.
- Related遺失いしつWrittenWritten word for losing property, as in 「遺失物」; leans legal and concerns objects, while 「逸する」 concerns missed chances.
- Related亡失ぼうしつWrittenWritten word for losing something, now little used; centers on objects going missing, while 「逸する」 mostly concerns chances.
- Related無くなすなくなすCasualColloquial, dialectal verb for losing an object, not much used; 「逸する」 is written and mostly about chances.
「逸する」 is a written word for missing a chance or straying from the norm, as in 「好機を逸する」「常軌を逸する」. In speech use 「逃す」; for losing something in general use 「失う」, and for losing objects use 「無くす」 or 「紛失」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
English equivalents
See also
