bulkheadWiktionary 原文中文来自 ECDICTn.隔壁，防水壁构词拆分bulk词根/词干+head词根/词干演变路径（由近及远）英语源自 ←古诺尔斯语 bálkr “partition”词源说明From Old Norse bálkr (“partition”) + head, anglicised as bulk + head.释义（英文）名词 Noun(nautical) A vertical partition dividing the hull into separate compartments; often made watertight to prevent excessive