imperious

Eventually, that imperiousness helped to alienate her own party, which forced her to step down in 1990.
British Prime Minister Margaret Thatcher’s Lasting Legacy|Christopher Dickey|April 8, 2013|DAILY BEAST
There is an imperiousness about Romney that comes across when he is challenged.
Their Many Debate Missteps Could Haunt Romney and Santorum|John Avlon|February 23, 2012|DAILY BEAST
"But I will not," he said masterfully, looking straight into her eyes with an imperiousness that sat well upon him.
Lucy Maud Montgomery Short Stories, 1896 to 1901|Lucy Maud Montgomery
In truth, his imperiousness, his contempt, had been melted and charmed away by the genial smiles of his auditors.
Money Magic|Hamlin Garland

The change was marked in the imperiousness of Randolph's bearing, in the curl of his lip, and the abruptness of his speech.
Trevethlan: (Vol 2 of 3)|William Davy Watson
Miss Carruth, said the young preacher with imperiousness, my work is not a parlor charade.
A Singular Life|Elizabeth Stuart Phelps
She imperiously commanded, yet there was under the imperiousness a note of pleading.
The Key to Yesterday|Charles Neville Buck

British Dictionary definitions for imperiousness

imperious

/ (ɪmˈpɪərɪəs) /

adjective

domineering; arrogant; overbearing

rare urgent; imperative

Derived Forms

imperiously, adverbimperiousness, noun

Word Origin for imperious

C16: from Latin imperiōsus from imperium command, power

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012