fermeture
noun
fer·me·ture
ˈfərməˌchu̇(ə)r
plural -s
: the mechanism closing the breech of a breech-loading firearm
Word History
Etymology
French, literally, act of closing, apparatus for closing, from Middle French, from Medieval Latin firmatura lock, clasp, from Latin firmatus (past participle of firmare to make fast) + -ura -ure (verb)