IPA: //ˈbrɛstˌstroʊk//
KK: /ˈbrɛstˌstroʊk/
A type of swimming stroke where the swimmer lies face down and moves their arms in a circular motion while kicking their legs in a frog-like manner.
She won the race by using her best breaststroke technique.
Breaststroke → The word is formed from "breast" (from Old English "brēost", meaning the front of the body) and "stroke" (from Old English "strōc", meaning a movement or action). The term "breaststroke" refers to a swimming style where the swimmer's chest is facing down and the arms move in a circular motion, resembling a stroke from the chest area.
Think of the swimmer's chest ('breast') being the main part of the body that leads the movement ('stroke') in this swimming style.