imperiously

adverb2

1. •
   In an imperious manner; in the style of an emperor.

   • 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. — 2005
2. •
   In a way that brooks no refusal; commandingly.

   • Something up above was calling him imperiously[.] — 1908