せっかちsekkachi

1. na-adjective, nounhasty; impatient; restless; rashfrom 急き勝ち (haste-prone)
   せっかちな運転者うんてんしゃが赤信号あかしんごうを無視むしして交差点こうさてんを通とおりぬけた。↗

   An impatient driver forced his way through the crossing against the red light.

• Synonym短気たんきNeutralQuick temper: stresses getting angry easily and lacking patience. せっかち is more about rushing things and doesn't necessarily involve anger.
• Synonym気短きみじかCasualColloquial for an impatient, restless nature — can't sit still or stay calm. Close to せっかち, but leans more toward irritability.
• RelatedいらいらNeutralA passing state of feeling irritated and on edge. It's an emotion, not a character trait like せっかち.
• Related焦燥しょうそうWrittenWritten/formal word for an anxious, restless feeling, as in 「焦燥感」. It names an emotion, not a personality like せっかち.
• Related短慮たんりょWrittenWritten/formal term: shallow thinking and rash, thoughtless action; can also mean a quick temper. The emphasis differs from せっかち.
• Related癇性かんしょうWrittenWritten and rare: a neurotic, irritable nature — touchy, quick to flare up, or morbidly fastidious. More pathological than せっかち.
• Related癇癖かんぺきWrittenWritten and rare: an irritable, fiery temper — a character prone to anger. Leans more toward anger than せっかち.
• Related癇癪かんしゃくNeutralA sudden flare-up of temper, as in 「癇癪を起こす」. More intense than せっかち — it's about the outburst itself.
• RelatedむしゃくしゃCasualColloquial: feeling vexed and frustrated, itching to vent. It's a mood, not a character trait like せっかち.
• AntonymのんびりCasualColloquial opposite of せっかち: taking it easy, living unhurried and carefree.
• AntonymゆっくりNeutralThe opposite of せっかち: slowly and unhurried, taking one's time.

Use 「せっかち」 for someone hasty and impatient to get things done, as in 「せっかちな人」. For a quick temper say 「短気」; for a moment of irritation, 「苛々」. The opposite is 「のんびり」.

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

1. 気きぜわしいこと。性急せいきゅうなこと。気きが短みじかいこと。また、そのさま。