ガット

がっと
noun
gut; gut string (for racket or instrument)
sportstool
1. gut; gut string (for racket or instrument)
String made from animal intestines (or synthetic equivalent), used to string tennis rackets, badminton rackets, and stringed musical instruments.
The strings on my racket broke.
I had new strings put on (the racket).
テニスのガットは硬(かた)さによって打(う)ち心地(ごこち)が変(か)わる。
The feel of tennis strings changes depending on their tension.

From English 'gut'. Originally referred to strings made from animal intestines; today most strings are nylon or synthetic, but the term ガット is still used for racket strings in general.

Common collocations

Note: Not to be confused with the homophone GATT (関税(かんぜい)及(およ)び貿易(ぼうえき)に関(かん)する一般協定(いっぱんきょうてい), the pre-WTO trade agreement), which is written the same way in katakana.