そそっかしいsosokkashii

1. i-adjectivecareless; thoughtless; hasty; rash
   バスに傘かさを忘わすれるとは彼女かのじょはそそっかしい。↗

   It was careless of her to leave her umbrella in the bus.

• Synonym軽率けいそつNeutralEmphasizes acting without thinking, as in 「軽率な発言」; 「そそっかしい」 pictures flustered haste and the mistakes it causes.
• Synonym不注意ふちゅういNeutralPoints to a lack of attention or care, as in 「不注意で忘れる」 or 「不注意による事故」; it stresses inattention, not the flustered rush of 「そそっかしい」.
• Synonym軽はずみかるはずみNeutralSuggests acting hastily without thinking, as in 「軽はずみな行動」; used in warnings, judgments or self-reflection. It stresses rashness rather than flustered haste.
• Synonym軽々しいかるがるしいNeutralDescribes rash words and deeds, as in 「軽々しく口にする」; mostly about speech and conduct, stressing lack of prudence.
• Synonym粗忽そこつWrittenWritten/formal and somewhat old-fashioned, for carelessness or the blunders it causes, as in 「粗忽者」; in everyday speech say 「そそっかしい」.
• Related無謀むぼうNeutralMeans reckless disregard of the consequences, as in 「無謀な計画」; stronger than 「そそっかしい」.
• Relatedだらし無いだらしないNeutralRefers to being sloppy or undisciplined, as in 「だらしない格好」; stresses untidiness and lack of backbone, not flustered carelessness.
• Related浅はかあさはかNeutralDescribes shallow, short-sighted thinking, as in 「浅はかな考え」; the stress is on shallow thought, while 「そそっかしい」 stresses flustered mistakes.
• Related軽薄けいはくNeutralDescribes a frivolous, insincere person, as in 「軽薄な男」; the stress is on insincerity of character, while 「そそっかしい」 stresses hasty carelessness.
• Related粗雑そざつNeutralMeans rough, sloppy workmanship, as in 「粗雑な作業」; stresses lack of thoroughness in doing things, while 「そそっかしい」 stresses the rush.
• Relatedいい加減いいかげんCasualColloquial for perfunctory, half-hearted responses, as in 「いい加減な返事」; stresses irresponsibility rather than flustered haste.
• Related向こう見ずむこうみずNeutralDescribes reckless daring that ignores the consequences, as in 「向こう見ずな若者」; the emphasis is on boldness, while 「そそっかしい」 stresses carelessness.
• Related無考えむかんがえWrittenWritten and rare; means acting without thought or consideration. In everyday speech 「軽率」 is more common.
• Related無分別むふんべつWrittenWritten language for lacking judgment or a sense of propriety, as in 「無分別な行い」; stresses the inability to tell right from wrong.
• RelatedちゃらんぽらんCasualColloquial for a slapdash, irresponsible attitude of not taking things seriously; 「そそっかしい」 is flustered and careless, not half-hearted in attitude.
• RelatedうかつNeutralMeans careless or off one's guard, as in 「うかつにも忘れた」; stresses blunders from lack of attention, without the flustered rush.
• Related無鉄砲むてっぽうNeutralMeans headlong recklessness, as in 「無鉄砲な性格」; close to 「向こう見ず」, stressing disregard of consequences.
• Related無思慮むしりょWrittenWritten and rare; means lacking thought. In everyday speech say 「軽率」 or 「考えが足りない」.
• Antonym慎重しんちょうNeutralThe opposite of 「そそっかしい」: careful, thorough judgment, as in 「慎重に判断する」.
• Antonym丁寧ていねいNeutralThe opposite of 「そそっかしい」's carelessness: thorough and attentive down to the details.
• Antonym落ち着いているNeutralThe opposite of 「そそっかしい」's flustered haste: calm and composed.

Use 「そそっかしい」 for flustered, hasty behavior that leads to mistakes. For words or actions made without thinking, use 「軽率」; for lapses in attention, 「不注意」 or 「うかつ」; for sloppy, half-hearted attitudes, 「いい加減」. The opposite is 「慎重」.

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

1. 行動こうどうなどに落ち着おちつきがないさま。不注意ふちゅういで失敗しっぱいが多おおいさま。慌てん坊あわてんぼうだ。