Having small holes or cracks that allow liquid or gas to escape; not watertight.
From 'leak' (from Old Norse 'leka' meaning to drip) plus the adjective suffix '-y.' The word has meant the same thing since it entered English from Scandinavian languages.
The metaphor 'leaky' has expanded in the digital age—we now talk about leaky passwords or leaky classified information, where 'leaky' means information is escaping unintentionally, just like water from a broken pipe.
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