karabiner

noun
🔊/ˌkærəˈbiːnə(r)/
🔊/ˌkærəˈbiːnər/
(also carabiner)
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  1. 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’.