undermine somebody's authority

It could undermine his authority, and that would never be allowed to happen.

Paris didn't want undermine the security chief's authority, but he had to say it.

The teacher ran to the principal and said I had undermined her authority.

"Did you ever hear of a thing called conspiracy to undermine authority?"

Such an election could undermine, rather than legitimate, his authority.

That kind of writing always risks undermining an author's authority.

If she ignored him, it would undermine his authority with the crew.

Sergeant Williams had undermined his authority, he said - again.

Good, she wasn't going to undermine my authority by contradicting me.

He is told of an unusual situation that could undermine his authority in the locker room.