Sometimes used as a short name for the Lonely Isle (S/50), more properly Tol Eressëa.
Quenya
eressë
solitude
eressë
noun. solitude, separation, isolation, [ᴹQ.] solitude, separation, isolation; [ᴱQ.] alone, by oneself, singly, only; once
eressëa
place name. Lonely (Isle)
eressëa
lonely
eressëa adj. "lonely" (ERE, LT1:269), "solitary" (cf. Letters:386). Eressëa place-name "Lonely (One)", often used by itself for Tol Eressëa, the Lonely Isle (Silm) or Solitary Isle (Letters:386, footnote)
eressëa
adjective. lonely
eressë noun "solitude" (ERE). In early "Qenya", eressë was an adjective or adverb: "singly, only, alone" (LT1:269).