厚(あつ)い

あつい

adjective (i-adjective)

thick

1. thick (not thin)

Describes something with considerable thickness or depth. The opposite of 薄(うす)い (thin). Used for books, walls, slices, etc. Different from 暑(あつ)い (hot weather) and 熱(あつ)い (hot to touch).

この本(ほん)は厚(あつ)いですね。

This book is thick, isn't it?

厚(あつ)い本(ほん)を読(よ)んでいます。

I'm reading a thick book.

この紙(かみ)は厚(あつ)くて、書(か)きやすいです。

This paper is thick and easy to write on.

冬(ふゆ)は厚(あつ)いコートを着(き)ます。

I wear a thick coat in winter.

厚(あつ)い辞書(じしょ)を買(か)いましたが、重(おも)くて持(も)ち運(はこ)びが大変(たいへん)です。

I bought a thick dictionary, but it's heavy and hard to carry around.

厚(あつ)い is an i-adjective meaning thick (having considerable depth or density).

FORMS:

Adverbial: 厚(あつ)く
Noun form: 厚(あつ)さ (thickness)

DON'T CONFUSE (all あつい):

厚(あつ)い: thick (e.g., book, wall)
暑(あつ)い: hot (weather, room)
熱(あつ)い: hot (to touch, e.g., tea)

OPPOSITE:
薄(うす)い: thin

COMMON COLLOCATIONS:

厚(あつ)い本(ほん): thick book
厚(あつ)いコート: thick coat
厚(あつ)い紙(かみ): thick paper

basic

Added 2026.1.7 21:56 · Revised 2026.2.13 11:44

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