etymologeek.com dictionary
English word breeches comes from Proto-Germanic *brōks (trousers), which itself is derived from earlier *brāks (rear end, rump), from Pre-Germanic *bʰrāg-, from Proto-Indo-European *bʰreg- (to break, crack, split).

Breeches etymology history?

Breeches detailed word origin explanation

Dictionary entryLanguageDefinition
*bʰreg- Proto-Indo-European (ine-pro) to break, crack, split
*brāks Proto-Germanic (gem-pro)
*brōks Proto-Germanic (gem-pro) rear end, rump, hindquarters, but also trousers
*brōkiz Proto-Germanic (gem-pro)
brōc Old English (ang)
brēċ Old English (ang)
brech Middle English (enm)
breches Middle English (enm)
breeches English (eng) (informal) Trousers; pantaloons; britches.. A garment worn by men, covering the hips and thighs; smallclothes.

Words with the same origin as breeches

Descendants of *brōkaz
Brooke Brookhaven Brussels Brussels ground Brussels point Brussels sprout branch water breach breech breeks brook creek
Descendants of *brāks
braccae bracket bracketology bragget braies bray brogue broguish outbray price bracket vraka
Descendants of *brukiz
breakle breech-loading brickle