keelhaul แปลว่า

"March 11 [1667].—Hermans Jans, boatswain; disobedience of orders and stabbing his captain; sentenced to be degraded to common seaman, to be thrice keelhauled, to be well flogged, to have the knife stuck through his hand, and to forfeit, pro fisco, 6 months' wages."

"By degrees they became noisier and noisier, their conversation principally turning on that infernal naval lieutenant, as they were pleased to designate me, and what they intended to do with him. Some suggested “keelhauling” him; others, a dose of his favourite cat-o’nine tails; whilst many advised making a target of him for a little practice with that revolver which had previously so cowed them all."

"To keelhaul is the cruelest and most dangerous of punishments and tortures ever devised for men aboard a ship. It involves trussing a man up with ropes, throwing him overboard, unable to swim, and hauling him under the boat's keel from one side to the other, or even from stem to stern. Most of those keelhauled under water are already dead when their punishment is over."