imperious

Eventually, that imperiousness helped to alienate her own party, which forced her to step down in 1990.

There is an imperiousness about Romney that comes across when he is challenged.

"But I will not," he said masterfully, looking straight into her eyes with an imperiousness that sat well upon him.

In truth, his imperiousness, his contempt, had been melted and charmed away by the genial smiles of his auditors.