The etymology of the word is not obvious.
Arguably, it is a compound of the words *anaxara *"most rushing" (an- "most" + *axara, a possible derivative from root SKAR; cf. ascar) plus arta "exalted". The word *Anaxararta would be simplified as Anaxarta.
- Anaxartaron (gen.pl.) *"of the Valar" or *"of the Great Eagles"