IPA: //ˈtɒpspɪn//
KK: /ˈtɑpˌspɪn/
A type of spin applied to a ball that makes it rotate forward as it moves, commonly used in sports like tennis.
The player used topspin to make the ball bounce higher after it hit the ground.
Topspin → The word is formed from "top" (from Old English *toppa*, meaning the highest point or summit) and "spin" (from Old English *spinnan*, meaning to turn or twist). The term "topspin" refers to a type of spin that causes the top part of a ball to rotate forward, affecting its trajectory.
Think of the 'highest point' ('top') of a ball that is 'turning' ('spin') forward — that's how topspin affects the ball's movement.