An example of someone who is disdainful is a person saying they dislike someone just because of their religion.
He was disdainful of those he thought of as the little people. He openly sneered at them. They mocked him behind his back.
She glimpsed at the people whom she had left behind, and smirked in the most disdainful manner towards them.
Origin of disdainful
- From disdain + -ful.