köken: Inherited from Middle French breche, bresche, from Old French breche, bresche (“a breach, an opening, crack”), from Frankish *breka (“a breach, break”), from Proto-Germanic *brekō (“a breaking, breach, fallow ground”), from Proto-Indo-European *bʰreg- (“to break, crack”). Cognate with Old High German brecha (“a break”). More at break.
köken: Internationalism, from Italian breccia, from French brèche, from Middle French breche, from Old French breche, from Vulgar Latin *breca, of Germanic origin, from Frankish *breka. The nonstandard form of brèksi is a loanword from Dutch breccie.