Quenya 

nandorin

proper name. Nandorin

An adjective describing the Silvan Elves, the Nandor, as well as a name for their language (WJ/390, 407), a combination of their tribal name with the language/adjective suffix -rin.

Elements

WordGloss
Nandor“Silvan Elves, (lit.) Those who go back”
-rin“-ian, racial-adjective, language”
Quenya [LT2I/Nandorin; PE18/078; PMI/Nandor; TII/Nandorin; UTI/Nandor; WJI/Nandorin] Group: Eldamo. Published by

Nando

one who goes back on his word or decision

#Nando (1) pl. Nandor noun name of the Green-elves (Laiquendi). The primitive word ¤ndandō, whence Quenya Nando, implied "one who goes back on his word or decision", since the Nandor left the March from Cuiviénen to Aman. Adj. Nandorin. (WJ:412, VT48:32)