ea (n.)youdaoicibaDictYouDict[ea 词源字典]
the usual Old English word for "river, running water" (still in use in Lancashire, according to OED); see aqua-. "The standard word in place-names for river denoting a watercourse of greater size than a broc or a burna" [Cambridge Dictionary of English Place-Names].[ea etymology, ea origin, 英语词源]