How to Say "Thick" in Japanese

厚い

atsui

The English word "thick" is translated into Japanese as 厚い (atsui).

厚い is used to describe something that has a relatively great extent from one surface to another, such as the thickness of a book or a slice of bread.

Meaning: relatively great in extent from one surface to another (adj)

Which one should you use?

Additionally, be careful not to confuse the pronunciation of 厚い (thick) with 暑い, which is a homophone used to describe hot weather.

To use the word as an adverb meaning "thickly", change the form to 厚く.

atsui

Do not confuse 厚い (atsui, thick) with 暑い (atsui, hot weather), as they are homophones.

There is a third homophone for 厚い (thick) and 暑い (hot weather), which is 熱い. This version refers to an object that is hot to the touch, like a cup of coffee.
In Japanese, the word 厚い is used to describe a 'thick' face 厚顔, which is a way of calling someone brazen or shameless.
While 厚い (atsui) is used for the physical thickness of an object, Japanese speakers use the word 濃い (koi) to describe 'thick' liquids like soup or coffee.

分厚い本だな。
The book is thick.
This sentence shows how to use 厚い to describe a book.
Tatoeba #11839588 by small_snow, translation #10060003 by ddnktr
あの厚い本を読んでたの？
Did you read that thick book?
This sentence uses 厚い to ask about reading a thick book.
Tatoeba #5070660 by 999yudai, translation #70313 by CK
その本は厚いが、高くはない。
That book is thick, but it's not very expensive.
This sentence demonstrates the use of 厚い in a comparison.
Tatoeba #554738 by Namikaze, translation #556613 by Pun_intended
この本はとても厚いです。
This book is very thick.
このソースは濃いですね。
This sauce is thick, isn't it?
このロープは太いですね。
This rope is thick, isn't it?
このパンの厚さはすごいよ。
The thickness of this bread is impressive.
12 more sentences on Tatoeba

Misaki and Ren are looking at a piece of steak in a restaurant.

蓮 Ren

このステーキ、すごく厚いね。
Kono suteeki, sugoku atsui ne.
This steak is really thick, isn't it?
美咲 Misaki

本当だ。食べ応えがありそう！
Hontou da. Tabegotae ga arisou!
It really is. It looks very filling!
蓮 Ren

厚いお肉は最高だよね。
Atsui oniku wa saikou da yo ne.
Thick meat is the best, right?
美咲 Misaki

うん、すごく楽しみ！
Un, sugoku tanoshimi!
Yeah, I'm really looking forward to it!

Sources

⭐Share⭐ to appreciate human effort 🙏