karabiner

/ ˌkærəˈbiːnə /

noun

1. Also called: snaplink.  krab. mountaineering a metal clip with a spring for attaching to a piton, belay, etc

Word History and Origins

Origin of karabiner¹

shortened from German Karabinerhaken, literally: carbine hook, that is, one used to attach carbines to a belt

Example Sentences

I keep my keys on a karabiner, some kind of sentimental shout-out to production life and ye olde rock climbing days.

From The Verge