Plural of buntline; ropes attached to the bottom edge of sails that pull them up toward the yard when furling sails on a ship.
From 'bunt' (to pull up or gather) plus 'line,' a nautical term dating from at least the 1600s describing essential rigging equipment.
Sailors had to memorize dozens of rope names, and buntlines were crucial—sailors sang songs about them because they were so essential for controlling the massive canvas sails!
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