The story
- Old French · derived fromembrasure“cut at a slant, make a groove or furrow”
- French · borrowed fromembrasure
- English todayembrasure
From French embrasure, from embras(er) + -ure, from Old French embrasure (“cut at a slant, make a groove or furrow”), from em- + braser (“cut at a slant”).
Etymology from Wiktionary, CC BY-SA 4.0.