Adjective

(-)

Domineering, arrogant, or overbearing.

* 1866 – , translated by C. J. Hogarth

...she glanced about her in an imperious , challenging sort of way, with looks and gestures that clearly were unstudied.

Urgent.

* 1891 –

Circumstances of an imperious nature, which it is unnecessary to relate here, had prevented him from taking service with that gallant army which had fought the disastrous campaigns ending with the fall of Corinth.

(obsolete) Imperial or regal.

* 1895 –

She was quick, beautiful, imperious , while he was quiet, slow, and misty.

Adjective

(en adjective)

Unaffected or unable to be affected by.

*

, title=(The Celebrity), chapter=5 , passage=Although the Celebrity was almost impervious to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.}}

Preventive of any penetration; impenetrable, impermeable, particularly of water.

Immune to damage or effect.