Hardheaded (adjective)

1. Having a stubborn, inflexible attitude.
2. Pragmatic and practical, not influenced by emotions or ideals.

Origin:

From the combination of the words hard + headed, which means having a stubborn, inflexible attitude.

Examples:

1. He was hardheaded and refused to listen to any other opinions.
2. She was hardheaded and always stuck to her plan.
3. He is a hardheaded businessman, he never lets emotions guide his decisions.
4. The hardheaded approach to the problem led to a successful outcome.
5. He was hardheaded, but his ideas were always practical and worked.