Unapproachable (adjective)

Not able to be approached or communicated with easily.

Origin:

From un- + approachable.

Examples:

1. The celebrity seemed unapproachable, surrounded by bodyguards and a entourage.
2. The unapproachable attitude of the manager made it difficult to work with her.
3. He seemed unapproachable and distant, and I didn't know how to talk to him.
4. The unapproachable beauty of the mountain range was breathtaking.
5. The unapproachable demeanor of the professor made it hard for the students to ask questions.