分厚い・部厚い|ぶあついbuatsui[0]heiban (flat)
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Which spelling to use
分厚い分厚い is written with kanji and kana and is the most common form; beginners should use it in their own writing.
部厚い部厚い is written with kanji and kana but is rarely used. It has the same meaning as 分厚い and may be encountered as an alternative written form.
Definitions
- i-adjectivethick; bulky; massive; heavy
Conjugation
| Plain form | 分厚い（ぶあつい） |
|---|---|
| Polite (desu) | 分厚いです（ぶあついです） |
| Negative (kunai) | 分厚くない（ぶあつくない） |
| polite (ku arimasen) | 分厚くありません（ぶあつくありません） |
| Past (katta) | 分厚かった（ぶあつかった） |
| Past negative (kunakatta) | 分厚くなかった（ぶあつくなかった） |
| Te form (kute) | 分厚くて（ぶあつくて） |
| Adverbial (ku) | 分厚く（ぶあつく） |
| Conditional (kereba) | 分厚ければ（ぶあつければ） |
| kattara | 分厚かったら（ぶあつかったら） |
Common forms generated by rule; see the senses for honorific or irregular usage.
Synonyms & antonyms
- Synonym厚手あつでNeutralFor thick paper or cloth, as in 「厚手のコート」; 「分厚い」 suits things that are thick as a whole, like books or steaks.
- Synonym厚いあついNeutralThe all-purpose adjective for thick, also for deep affection; the widest use. 「分厚い」 stresses that something is quite thick, with a marked sense of thickness.
- Synonym肉厚にくあつNeutralDescribes thick, plump flesh or the thickness of parts, as in 「肉厚の椎茸」; 「分厚い」 is for things that are thick as a whole.
- Antonym薄いうすいNeutralThe opposite in thickness: thin, and also pale or diluted. Use it when something lacks the thickness 「分厚い」 conveys.
Use 「分厚い」 for things that are quite thick with a strong sense of bulk, as in 「分厚い本」 or 「分厚いステーキ」. For ordinary thickness use 「厚い」; for thick paper or cloth, 「厚手」; for thick, plump flesh or parts, 「肉厚」; the opposite is 「薄い」.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese definitions
Kanji in this word
English equivalents
See also
