IPA: /ˈbɔːlɡɜːrl/
KK: /bɔlɡɪrl/
A young girl who assists in a sports event, especially tennis, by retrieving and delivering balls to the players.
The ballgirl quickly ran to fetch the tennis balls during the match.
Ballgirl → The word is formed from "ball" (from Old English *beall*, meaning a spherical object used in games) and "girl" (from Old English *gyrl*, meaning a young female). A ballgirl is a young female who assists in games involving a ball, typically by retrieving balls that go out of play.
Think of a young female ('girl') who helps with a spherical object ('ball') during a game — that's what a ballgirl does.
No commonly confused words.