太い|ふといfutoi[2]nakadaka (mid-high)

1. i-adjectivefat; thick
   彼かれは太ふとい首くびをしている。↗

   He has a thick neck.
2. i-adjectivedeep (of a voice); thick; sonorous
3. i-adjectivedaring; shameless; brazen; audacious

• SynonymぶっといCasualColloquial and emphatic: stresses that something is very thick, more exaggerated than 「太い」, as in 「ぶっとい腕」.
• Synonym野太いのぶといNeutralDescribes a voice that is deep, rough and throaty, or a person who is bold and brazen, as in 「野太い声」.
• Related分厚いぶあついNeutralFor things that are quite thick, as in 「分厚い本」; it is about thickness rather than the girth 「太い」 describes.
• Related厚手あつでNeutralFor cloth, paper and similar materials with a thick texture, as in 「厚手のコート」; mostly used attributively.
• RelatedデブCasualColloquial word for a fat person; a derogatory slur, so use it with care.
• Related厚いあついNeutralFor great thickness, as in 「厚い壁」; 「太い」 is about large diameter or girth.
• Related太ったふとったNeutralDescribes people or animals that are fat with plenty of flesh, mostly as a modifier, as in 「太った猫」; 「太い」 covers both thick objects and plump bodies.
• Related肉厚にくあつNeutralFor flesh or parts that are thick and substantial, as in 「肉厚のしいたけ」; often used of food ingredients.
• Related肥大したひだいしたWrittenWritten/formal: abnormal swelling or enlargement, of organs or figuratively of organizations and power.
• RelatedでぶでぶCasualA mimetic word for a plump, chubby body; it carries a negative nuance and describes a person's build.
• Antonym細いほそいNeutralThe antonym of 「太い」: small in diameter, slender and fine.

For thick or fat things, 「太い」 is the default. Use 「厚い」 or 「分厚い」 for flat thickness, 「太った」 for a fat person or animal, 「野太い」 for a rough, deep voice, and 「ぶっとい」 to stress great thickness colloquially; thin is 「細い」.

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

1. 胴回どうまわりがおおきい。肉付ししつきがよく肥こえている。
2. 幅はばや直径ちょっけいなどが大おおきい。
3. 声こえが低ひくく大おおきい。
4. 物事ものごとに動どうじない。大胆だいたんである。
5. 図々ずうずうしい。ふてぶてしい。とんでもない。
6. 金額きんがくが大おおきい。金払かねばらいが良よい。