bröstsim (Swedish) comes from Swedish bröst, from Old Swedish bryst, from Old Norse brjóst, from Proto-Germanic breustą, from Proto-Indo-European bʰrews- — to break.
bröstsim (Swedish): breaststroke
Definitions
breaststroke
Ancestry of “bröstsim”, step by step
bröstsim traces back through two separate lines of ancestry.