uninhabited area; remote wilderness
Refers to a place far from human habitation, often with a literary or slightly old-fashioned feel. Not an everyday word; 無人地帯 or 秘境 are more common in modern speech.
The explorer walked for days through uninhabited wilderness.
Compound of 人外 (じんがい, 'outside human society') + 境 (きょう, 'boundary' or 'area'). The exact historical derivation is uncertain; the term appears in literary contexts.