Where does “brast” come from?

brast (Old Frisian) comes from Proto-Germanic breustą, from Proto-Indo-European bʰrews- — to break.

Ancestry of “brast”, step by step

StepLanguageWordMeaning
1Proto-Germanicbreustąbreast, chest
2Proto-Indo-Europeanbʰrews-to break
Every word from Proto-Indo-European bʰrews- →Every word from Proto-Germanic breustą →