prop. n. Tolkien proposed that the ending gorn was simply modeled on names such as Arathorn, Celegorn, and that the [?pure] Sindarin form of this name was Argorn. . This gloss was rejected.
Quenya
arcastar
proper name. Tolkien
curo
skillful [?device - tolkien's handwriting was illegible]
arcastar mondósaresse
Tolkien in Oxford
curo (curu-) noun "a skillful [?device - Tolkien's handwriting was illegible]". (VT41:10)