Set your face against somebody/something

Pro Tip 1/3

Conveys strong personal conviction against something, suggesting an unyielding stance.

Despite the popularity of the idea, she set her face against it for moral reasons.

Pro Tip 2/3

It's a metaphorical expression, not about one's literal face, but one's firm attitude.

He set his face against the unfair policies of the administration.

Pro Tip 3/3

Used mainly in serious or formal discussions about opposition to ideas or actions.

The committee set their face against the budget cuts due to potential risks.