IPA: /ˈhɛdˌpɪn/
KK: /hɛdˌpɪn/
A bowling pin that is positioned at the front of the group of pins in a bowling game.
The bowler aimed carefully at the headpin to maximize his chances of a strike.
Headpin → The word is formed from "head" (from Old English "heafod", meaning the upper part or top) and "pin" (from Old English "pinn", meaning a small, slender object used for fastening). The term "headpin" refers to a pin that has a head, typically used in bowling to describe the pins that are knocked down by the bowling ball.
Think of the 'top' part ('head') of a 'fastening object' ('pin') — that's why a headpin is a pin with a head.