imperiously

imperious +‎ -ly

imperiously (comparative more imperiously, superlative most imperiously)

1. In an imperious manner; in the style of an emperor.
   • 2005, Sean Dooley, The Big Twitch, Sydney: Allen and Unwin, page 72:

     Reversing the car I got the headlights on the bird sitting on the roadside fencepost to reveal a Powerful Owl imperiously staring back at us.

2. In a way that brooks no refusal; commandingly.
   • 1908, Kenneth Grahame, The Wind in the Willows, London: Wordsworth Classics, published 1993, page 12:

     Something up above was calling him imperiously[.]

• imperiously in The Century Dictionary, New York, N.Y.: The Century Co., 1911
• imperiously in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913