失策・失錯|しっさくshissaku[0]heiban (flat)

Common
Which spelling to use
失策失策 is the most common and standard spelling of this word. It is the form learners should normally choose when writing.
失錯失錯 is a variant written entirely in kanji, but it is rarely used, so learners will seldom need to write it.
Definitions
  1. noun, suru verb, intransitive verbblunder; slip; error
    その失策しっさくには弁解べんかいの余地よちがない。↗
    This fault admits of no excuse.
  2. noun, baseballerror
Conjugation
Dictionary form失策する(しっさくする)
Polite (masu)失策します(しっさくします)
Negative (nai)失策しない(しっさくしない)
polite (masen)失策しません(しっさくしません)
classical zu / nu失策せず・失策せぬ(しっさくせず・しっさくせぬ)
Past (ta)失策した(しっさくした)
polite (mashita)失策しました(しっさくしました)
Past negative (nakatta)失策しなかった(しっさくしなかった)
polite (masen deshita)失策しませんでした(しっさくしませんでした)
Te form失策して(しっさくして)
Potential失策できる(しっさくできる)
Passive失策される(しっさくされる)
Causative失策させる(しっさくさせる)
Causative passive失策させられる(しっさくさせられる)
Conditional (ba)失策すれば(しっさくすれば)
tara失策したら(しっさくしたら)
Volitional失策しよう(しっさくしよう)
polite (mashou)失策しましょう(しっさくしましょう)
Imperative失策しろ(しっさくしろ)

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

Synonyms & antonyms
  • Synonym過ちあやまちWrittenWritten register. Refers to a fault or wrongdoing with a moral shade, as in 「過ちを犯す」; 「失策」 is about errors in strategy or judgment.
  • SynonymエラーNeutralLoanword for an error, a system error message, or a fielding mistake in baseball; 「失策」 is the formal scoring term for a fielding error.
  • Synonym失敗しっぱいNeutralThe broadest word for failure; 「失策」 leans toward botching an action or a lapse in judgment, and also covers baseball fielding errors.
  • SynonymしくじるCasualColloquial verb: to mess up, and also to be fired over a blunder; 「失策」 is a noun focused on strategy.
  • Synonym間違いまちがいNeutralThe most widely used word for a mistake or getting something wrong; 「失策」 leans toward errors in strategy or judgment.
  • Synonym過失かしつWrittenWritten register: a fault caused by carelessness or negligence, common in legal contexts; 「失策」 is about a lapse in judgment.
  • Synonym失態しったいWrittenWritten register: a blunder that costs you face, as in 「失態を演じる」; 「失策」 does not stress the loss of face.
  • Synonym錯誤さくごWrittenWritten register: a mismatch between one's understanding and the facts, as in 「試行錯誤」; 「失策」 is an error in strategy.
  • SynonymミスNeutralLoanword for a slip or mistake, the most common choice in daily life; 「失策」 is more written and judgment-oriented.
  • Synonym間違えるまちがえるNeutralTransitive verb for getting something wrong or mixing things up; 「失策」 is a noun.
  • Synonym間違うまちがうNeutralVerb used both transitively and intransitively, as in 「答えを間違う」; 「失策」 is a noun.
  • Synonym過誤かごWrittenWritten register: a fault or error, mostly in medical and legal contexts like 「医療過誤」; 「失策」 leans toward strategy.
  • Synonym落ち度おちどNeutralA lapse deserving blame, as in 「当方の落ち度」; 「失策」 is about a lapse in judgment.
  • SynonymドジるCasualColloquial: to botch something through silliness, often self-deprecating; 「失策」 is a strategic error and more formal.
  • SynonymしそこなうNeutralVerb for failing to do something or missing a chance; 「失策」 is a noun for botching an action or a lapse in judgment.
  • Synonym仕損じるしそんじるWrittenWritten verb for botching work or a task, as in 「急いては事を仕損じる」; 「失策」 is a noun.
  • Synonym仕損ずるしそんずるWrittenThe 「〜ずる」 counterpart of 「仕損じる」 with the same meaning; 「失策」 is a noun.
  • Synonym粗相そそうNeutralA careless mistake or breach of etiquette, also soiling oneself; common in everyday apologies like 「粗相をいたしました」; 「失策」 is about judgment.
  • Synonym遣り損なうやりそこなうNeutralVerb for failing to do something well or missing a chance; 「失策」 is a noun.
  • SynonymポカCasualColloquial: originally a bad move in go or shogi, now a careless, silly mistake; 「失策」 leans toward misjudgment.
  • SynonymしくじりCasualColloquial noun for a botched job or failure; 「失策」 is more formal.
  • SynonymとちるCasualColloquial: an actor flubbing lines, or messing up when flustered; 「失策」 leans toward strategy.
  • Synonym遣り損じるやりそんじるNeutralVerb for botching something or handling a task (or a car) badly; 「失策」 is a noun.
  • RelatedつまずくNeutralTo trip or stumble, or to suffer a setback in a venture; 「失策」 is a concrete error in judgment.
  • Related誤りあやまりWrittenWritten register: an incorrect point or error, as in 「誤りを認める」; 「失策」 leans toward strategy.
  • Antonym成功せいこうNeutralAntonym: things going well and a goal being achieved, the opposite of 「失策」's botched action or misjudgment.

「失策」 covers errors in strategy or judgment and botched actions, and is the formal term for a baseball fielding error. For everyday mistakes use 「ミス」 or 「間違い」, for failure 「失敗」, for blunders that cost face 「失態」; the opposite is 「成功」.

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

Japanese definitions
  1. やりそこなう(しそこなう)こと。
  2. (野球やきゅう、ソフトボール)野手やしゅが守備しゅびを失敗しっぱいすること。エラー。
Kanji in this word
See also

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