1) Elfin 2) Elfish 3) Good-naturedly mischievous 4) Language of Middle-earth 5) Playful 6) The Lord of the Rings lingo 7) Tolkien language Found on https://www.crosswordclues.com/clue/elvish
• (a.) Mysterious; also, foolish. • (a.) Pertaining to elves; implike; mischievous; weird; also, vacant; absent in demeanor. See Elfish. Found on http://thinkexist.com/dictionary/meaning/elvish/
Elv'ish adjective 1. Pertaining to elves; implike; mischievous; weird; also, vacant; absent in demeanor. See Elfish . « He seemeth elvish by his countenance.» Chaucer. 2. Mysterious; also, foolish. [ Obsolete] Found on http://www.encyclo.co.uk/webster/E/23