How to Say "Resin" in Japanese

樹脂

jushi[d͡ʑɨɕi]

The English word resin is translated into Japanese as 樹脂 (jushi).

樹脂 is a noun used to describe a resin, which can refer to both natural and synthetic compounds.

Meaning: similar synthetic compound (noun)

What does it mean word for word?

The word is composed of the characters 樹 (tree) and 脂 (fat/oil/grease).

jushi

In modern Japanese hobbyist circles, the English word 'resin' is often borrowed directly as a loanword レジン (rejin). This term is used almost exclusively for UV-cured craft resins, while 樹脂 remains the word for industrial materials.
The character 脂 in 樹脂 also appears in the word 脂肪 (shibō), which means 'fat' or 'adipose tissue' in a biological sense. This reflects an ancient linguistic connection between the oils of plants and the fats of animals.
When referring to the fossilized resin known as amber, Japanese speakers often use the word 琥珀 (kohaku), which treats the substance as a gemstone rather than a chemical.

ポリエステル樹脂
Polyester resin
This example is useful for seeing how to use the form 樹脂 in the phrase 'polyester resin'.
Wiktionary
この商品はどの種類の樹脂で作られていますか？
Which type of resin is used to make this product?
この商品は主にポリウレタン樹脂を使用しています。
This product mainly utilizes polyurethane resin.
ありがとう！樹脂で作ったんだ。
Thank you! It's made of resin.
この製品は樹脂で作られています。
Kono seihin wa jushi de tsukurarete imasu.
This product is made of resin.
樹脂の質感を確かめてください。
Jushi no shitsukan o tashikamete kudasai.
Please check the texture of the resin.

Yui and Yota are looking at a handmade craft at a market.

結衣 Yui

この作品、樹脂を使っているのかな？
Kono sakuhin, jushi o tsukatte iru no kana?
I wonder if this piece uses resin?
陽太 Yota

うん、きっと樹脂だと思うよ。
Un, kitto jushi da to omou yo.
Yeah, I'm sure it's resin.
結衣 Yui

すごく透明で綺麗だね。
Sugoku tōmei de kirei da ne.
It's so transparent and beautiful.
陽太 Yota

陽太も一つ欲しくなったよ。
Yota mo hitotsu hoshiku natta yo.
Yota wants one too now.

Sources

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