合理的|ごうりてきgouriteki

1. na-adjectiverational; reasonable; logical
   彼女かのじょの思考法しこうほうは合理的ごうりてきだった。↗

   Her way of thinking was rational.

• Synonym論理的ろんりてきWrittenWritten/formal prose. Strictly about being logical; 「合理的」 also leans toward efficiency.
• Synonym理性的りせいてきWrittenWritten/formal prose. Calm judgment by reason, not emotion; 「合理的」 stresses accord with reason and efficiency.
• Synonym順当じゅんとうNeutralNeutral. The natural, expected outcome, as in 「順当な結果」; 「合理的」 leans toward logic.
• Synonym筋の通ったすじのとおったCasualColloquial. Says something makes sense and holds up; 「合理的」 also implies efficiency and cutting out waste.
• SynonymロジカルCasualColloquial loanword meaning strongly logical; 「合理的」 is the more general, versatile term.
• Related妥当だとうWrittenWritten/formal prose. Fitting and appropriate, as in 「妥当な判断」; 「合理的」 leans toward logic and efficiency.
• Related正当せいとうWrittenWritten/formal prose. Just and rightful; 「合理的」 centers on logic and efficiency.
• Related穏当おんとうWrittenWritten/formal prose. Measured and moderate, nothing drastic; 「合理的」 stresses accord with reason.
• Related科学的かがくてきWrittenWritten/formal prose. Scientific and empirical; 「合理的」 is the broader term.
• Related至当しとうFormalFormal. Supremely proper and right; in everyday speech 「妥当」 is the natural choice.
• Related首尾一貫したしゅびいっかんしたWrittenWritten/formal prose. Consistent from start to finish; 「合理的」 simply means according with reason.
• Antonym不合理ふごうりNeutralNeutral. Contrary to reason; the opposite of 「合理的」.
• Antonym非合理的ひごうりてきWrittenWritten/formal prose. Irrational; the direct opposite of 「合理的」.

Use 「合理的」 for what accords with reason or is efficient and free of waste, as in 「合理的な判断」. For what is purely logical, use 「論理的」 or 「ロジカル」; for what is fitting or proper, 「妥当」. The opposites are 「不合理」 and 「非合理的」.

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

1. 道理どうりや論理ろんりに基もとづいているさま。
2. 無駄むだを省はぶいて効率こうりつよく物事ものごとを行おこなうさま。