失踪|しっそうshissou[0]heiban (flat)

Common
Definitions
  1. noun, suru verb, intransitive verbdisappearance; running away; going missing; absconding
    3日か後ごになってはじめて彼女かのじょが失踪しっそうしたことを知しった。↗
    It was not until three days after that I knew she had disappeared.
Conjugation
Dictionary form失踪する(しっそうする)
Polite (masu)失踪します(しっそうします)
Negative (nai)失踪しない(しっそうしない)
polite (masen)失踪しません(しっそうしません)
classical zu / nu失踪せず・失踪せぬ(しっそうせず・しっそうせぬ)
Past (ta)失踪した(しっそうした)
polite (mashita)失踪しました(しっそうしました)
Past negative (nakatta)失踪しなかった(しっそうしなかった)
polite (masen deshita)失踪しませんでした(しっそうしませんでした)
Te form失踪して(しっそうして)
Potential失踪できる(しっそうできる)
Passive失踪される(しっそうされる)
Causative失踪させる(しっそうさせる)
Causative passive失踪させられる(しっそうさせられる)
Conditional (ba)失踪すれば(しっそうすれば)
tara失踪したら(しっそうしたら)
Volitional失踪しよう(しっそうしよう)
polite (mashou)失踪しましょう(しっそうしましょう)
Imperative失踪しろ(しっそうしろ)

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

Synonyms & antonyms
  • Synonym失跡しっせきWrittenWritten/formal prose synonym for 「失踪」: someone's whereabouts become unknown. In daily use and legal contexts, 「失踪」 is the standard word.
  • Synonym蒸発じょうはつCasualColloquial for a person suddenly going missing or running away from home; carries the nuance of the person making themselves disappear.
  • Synonym雲隠れくもがくれCasualColloquial: going into hiding, vanishing from sight, often deliberately to evade responsibility; 「失踪」 only says the whereabouts are unknown.
  • Related消えるきえるNeutralNeutral: to disappear or go out (lights, feelings, etc.); the widest-ranging of these words, but not specific to a person going missing.
  • RelatedなくなるNeutralNeutral: for things being lost or used up; mostly said of objects, not of people going missing.
  • Related消え失せるきえうせるNeutralNeutral: to vanish without a trace; also to die. Often carries an abusive tone, as in 「消え失せろ」.
  • RelatedドロンCasualSlang for dashing off or slipping away in a flash; colloquial and comical in feel.
  • Related失せるうせるCasualColloquial: to disappear or leave; also a rough insult as 「失せろ」.
  • Related失せ去るうせさるWrittenWritten/formal prose: to disappear, be gone. Uncommon, and not specific to a person going missing.
  • Related掻き消えるかききえるNeutralNeutral: for sounds, light or shadows suddenly dissipating; stresses vanishing in an instant.
  • Antonym発見はっけんNeutralAntonym: to find or discover; stands opposite to 「失踪」's unknown whereabouts.
  • Antonym帰還きかんNeutralAntonym: returning from a distant place, as in 「無事に帰還する」; stands opposite to 「失踪」.

Use 「失踪」 when a person's whereabouts or fate is unknown; it is also the legal term, as in 「失踪宣告」. For deliberate hiding say 「雲隠れ」, colloquially 「蒸発」; for disappearing in general 「消える」. Antonyms: 「発見」, 「帰還」.

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

Japanese definitions
  1. 人ひとの所在しょざいや生死せいしが知しれなくなること。
  2. 人ひとの所在しょざいや生死せいしが知しれなくなることが、一定期間いっていきかん以上いじょう継続けいぞくした結果けっか、死亡しぼうしたものとみなす制度せいど。
Kanji in this word
English equivalents
See also

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