elven (adj.)youdaoicibaDictYouDict[elven 词源字典]
Old English -ælfen (n.) "an elf or fairy," usually a female one (see elf). Not a pure adjective in Middle English (elvish was used), but used in phrases such as elven land (c. 1300). Apparently revived as an adjective by Tolkien (1937).[elven etymology, elven origin, 英语词源]