• (British) IPA: /ˈsɒlɪt(ə)ɹɪnəs/

solitariness

1. The state or quality of being solitary.
   • 1603, Michel de Montaigne, chapter 8, in John Florio, transl., The Essayes, […], book II, printed at London: By Val[entine] Simmes for Edward Blount […], OCLC 946730821 ↗:

     I saw a Deane of S. Hillarie of Poictiers, reduced by reason and the incommoditie of his melancholy to such a continuall solitarinesse, that when I entered into his chamber he had never removed one step out of it in two and twenty yeares before […].

   • So much as doing good is better than not doing evil, will I account Christian good fellowship better than an eremitish and melancholy solitariness.

• French: solitarisme
• German: Einsamkeit, Einsiedlerdasein