• 奴やつ — guy; fellow (colloquial / can be rude)
• 奴やつら — they; those guys
• 奴隷どれい — slave (historical term)
• 農奴のうど — serf
• 町奴まちやっこ — Edo-period “town bravo”

Formed from 女 and 又（hand）, the character originally evoked the idea of a person in another’s grasp. In compounds it came to mark “servant” or “bonded person,” and in modern speech the reading やつ is a rough way to say “guy.”

Think of a person under someone’s control, bound to serve. Add the character 隷—which conveys “to be bound; to follow”— and you get 奴隷（どれい）, a bonded person in the strictest sense. The word is historical and sensitive, but it helps you remember that 奴 points to a subordinate status in compounds.