Ea. Definition
(dialectal) A river or watercourse.
Origin of Ea.
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From Middle English, from Old English ēa (“running water, water, stream, river”), from Proto-Germanic *ahwō (“waters, river”), from Proto-Indo-European *h₂ekʷeh₂ (“water, flowing water”). Cognate with North Frisian ia (“river”), Eastern Frisian äi (“river”), Dutch aa (“water, stream”), German Ache (“water, stream, river, flood”), Swedish å (“stream, creek”), Icelandic á (“stream, river”), Latin aqua (“water”).
From Wiktionary
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Akkadian ḥyw in Semitic roots
From American Heritage Dictionary of the English Language, 5th Edition