eastern (adj.)youdaoicibaDictYouDict[eastern 词源字典]
Old English easterne "of the east, from the east; oriental; of the Eastern Orthodox Church; of the eastern part of the globe," from east + -erne, suffix denoting direction. Cognate with Old Saxon ostroni, Old High German ostroni, Old Norse austroenn. Eastern Shore of Maryland and Virginia so called from 1620s.[eastern etymology, eastern origin, 英语词源]