Supercilious (adjective)

1. Having or showing haughty disdain; arrogant.
2. Acting in a manner that is arrogant, disdainful, and often patronizing.

Origin:

From the latin word "supercilium" meaning eyebrow and the suffix "-ous" indicating having the qualities of.

Examples:

1. He had a supercilious attitude towards anyone who didn't share his point of view.
2. She had a supercilious look on her face when she talked to the waiter.
3. He was supercilious when addressing his employees.
4. The supercilious tone of his voice made him hard to take seriously.
5. The supercilious attitude was not befitting of someone in a position of authority.