grapnel
noun [ C ] uk/ˈɡræp.nəl/ us/ˈɡræp.nəl/ (also grappling iron, grappling hook, grappler)
（尤指旧时用于船上的）多爪（小铁）锚，爪钩
a device that consists of several hooks (= curved devices) on the end of a rope, used especially in the past on ships
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