How to say "solitary" in Japanese

• 寂しいさびしいJLPT N4approx.Common
  i-adjectiveCovers 'solitary' in the lonely, lonesome sense: sadness at being alone and missing company. It can also describe a desolate, bleak place; its 'solitary' sense is really this loneliness, not proud standing-apart.
  それで、彼女かのじょはとてもさびしく思おもっています。↗

  And she misses them very much.
• 孤高ここうCommon
  no-adjective, na-adjectiveCovers 'solitary' for a person who proudly stands apart from others: aloof, proudly independent, keeping their distance from the group by choice. The nuance is proud independence, with no suggestion of sadness or loneliness.
  ニューヨークはただ規模きぼの点てんで長ながいこと孤高ここうを保たもってきた。↗

  New York City has long been unusual because of its sheer size.

Use 「寂しい」 when 'solitary' means lonely or desolate — the sadness of being alone, or a bleak, empty place — and 孤高 when it describes a person who proudly stands apart, aloof and independent of others.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 寂しいさびしいlonely
• 孤高ここうaloof
• たった一つたったひとつsingle
• 単発性たんぱつせいsingle