car·a·bin·er
noun/ˌkærəˈbiːnə(r)/
/ˌkærəˈbiːnər/
(also karabiner)
- a metal ring that can open to allow a rope to pass through, used by rock climbers to attach themselves safely to things
（登山者使用的）穿索铁锁，岩钉钢环 Word Origin1930s: shortened from German Karabiner-haken ‘spring hook’.