The name of a red star (SI/Carnil), possibly Mars (MR/435), it is perhaps a compound of carnë (carni-) “red” and †él “star”. Alternately, it could be a simple consonant expansion: carni-l; hat-tip to Vyacheslav Stepanov for this suggestion.
Quenya
Carnil
carnil
carnil
proper name. *Red Star
Carnil ("k") name of a star (or planet), identified with Mars (MR:435)