solitariness

noun
1
the fact of being alone, without other people
تنهایی, انزوا, خلوت, عزلت
synonym loneliness(2)
2
pleasure in being alone; the fact of frequently spending time alone
تنهایی, خلوت, تنها بودن, یکه‌زیستی
Even as a boy he was given to solitariness.
compare loneliness(1)