The quality or state of having no hair or very little hair on the body or head.
From Old English 'hær' (hair) + '-less' (suffix meaning without, from Old English 'læs') + '-ness' (suffix forming abstract nouns). The '-less' suffix creates opposites.
While hairlessness in humans is relatively rare (except for certain genetic conditions), humans are the only primates that have progressively lost body hair over millions of years—and scientists still debate why we evolved this unusual trait.
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