アバウトabauto

1. na-adjectiveapproximate (number); rough (calculation)
2. na-adjectivesloppy; lackadaisical; crude
   あいつもアバウトな性格せいかくだよな。↗

   He's not a very meticulous guy.

• Synonym大雑把おおざっぱNeutralThe closest match: covers rough estimates and also a personality that ignores details or careless work. 「アバウト」 is more colloquial and lighter in tone.
• Synonym大まかおおまかNeutralGrasps the big picture, not the details; typical of explanations and estimates, often neutral or positive, and can describe a generous person. Milder than 「アバウト」.
• Related雑ざつNeutralCriticizes careless, rough handling of work or speech, as in 「扱いが雑」; the criticism is sharper than with 「アバウト」. Also a prefix meaning miscellaneous.
• Related粗雑そざつWrittenWritten/formal prose flavor; describes rough, sloppy workmanship or thinking, often criticizing articles or plans. The negative charge is heavier than 「アバウト」.
• Related粗いあらいNeutralAn adjective for coarse grains, mesh or texture; also for work that is not fine-grained, as in 「目が粗い」「計算が粗い」. Mostly used of concrete things.
• RelatedぞんざいNeutralTreating things or people perfunctorily, with rude, discourteous words and behavior. 「アバウト」 is about imprecision and carries no hint of rudeness.
• RelatedずさんNeutralFor materials, accounts, surveys or management riddled with holes and unreliable; strongly derogatory. 「アバウト」 just means rough and casual, and need not imply errors.
• RelatedちゃらんぽらんCasualColloquial; for people who drift through things irresponsibly. The criticism is far heavier than 「アバウト」, and it is used mainly to judge a person's character.
• Antonym精密せいみつNeutralThe opposite pole: precise down to every last detail, with no flaws anywhere, as in 「精密機械」. Directly opposed to the rough, imprecise 「アバウト」.
• Antonym正確せいかくNeutralMeans free of error and exactly right, as in 「正確な時間」. It stands opposite 「アバウト」, which settles for a rough approximation.
• Antonym詳細しょうさいWrittenWritten/formal prose flavor; thorough and detailed, and also the details themselves. It is the opposite of 「アバウト」 in level of detail.

Use 「アバウト」 in casual talk for rough approximations or a laid-back, easygoing personality — the tone is light. For general talk about rough estimates or a detail-ignoring character, 「大雑把」 and 「大まか」 are the standard choices. To criticize sloppiness, turn to 「雑」 or 「杜撰」. The opposites are 「正確」 and 「精密」.

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

1. (情報じょうほう、数量すうりょう、方法ほうほう、過程かてい、人ひとの性格せいかくなどが)大雑把おおざっぱなさま。大おおまかなさま。