cave dweller; caveman
Refers to a person who lives in a cave, either in prehistoric times or in a modern primitive context. The word is neutral and descriptive.
Cave dwellers lived in caves.
Tools of cave dwellers were discovered at this site.
Compound of 穴居 (けっきょ, 'living in a cave') and 人 (じん, 'person'). The exact historical derivation is uncertain, but the kanji directly convey the meaning.