This is the 4091st most frequent Japanese word.
ベルト
Belt.
Here, 'ベルト' refers to an accessory worn around the waist to secure pants or for fashion.
私は新しいベルトを買いました。
I bought a new belt.
In this sentence, 'ベルト' is used as part of 'シートベルト', which is a seatbelt used in vehicles for safety.
車の座席では、シートベルトを締めてください。
Please fasten the seatbelt in the car seat.
This usage of 'ベルト' refers to a mechanical belt used in machines to transmit power or motion.