A rope or line equipped with a grapnel or grappling hook, used for catching or securing objects.
Compound of 'grap' (variant of grasp/grab) + 'line'. This specialized nautical term likely developed in Middle English among seafarers needing terms for their rigging equipment.
Medieval sailors used graplines in naval warfare to literally grab enemy ships and pull them close for boarding—it's one of the most violent yet functional pieces of maritime technology.
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