What are the opposite words for over-familiar?

Over-familiar is an adjective that means excessively friendly or informal, often with someone who is not a close friend. Antonyms for over-familiar are words that have the opposite meaning. Some examples of antonyms for over-familiar are formal, reserve, distant, reserved, polite, and respectful. Formal refers to a polite and restrained manner, while reserve is a quality of staying aloof and distant from others. Distant means not close in terms of space, time, or relationship, and reserved means to hold back or restrain from showing emotions. Polite is a synonym for courteous, and respectful refers to showing honor or esteem towards someone.

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