When we say keep aloof we usually refer to someone who is withdrawn, distant, or detached. However, there are many synonyms for this term that can help us describe aloof behavior more specifically. Some of these synonyms include reserved, detached, unapproachable, cool, and standoffish. Each of these words reflects a different aspect of aloofness, whether it's a lack of warmth, a distance in communication, or an emotional detachment. By using these synonyms, we can more accurately describe someone's behavior and feelings, and better understand how to communicate with them.