As an adjective impetuous
is making arbitrary decisions, especially in an impulsive and forceful manner.
As a noun impertinence is
(uncountable) lack of pertinence; irrelevance.
Making arbitrary decisions, especially in an impulsive and forceful manner.
* 1880 , John Weeks Moore, Complete Encyclopaedia of Music , "":
Characterized by sudden and violent force.
* 1794 , :
- But it was natural, that the impetuous , restless young artist should incline more to excess of strength than of delicacy in his playing.
- He stands, and views in the faint rays
Far, far below, the torrent's rising surge,
And listens to the wild impetuous roar
(uncountable) Lack of pertinence; irrelevance.
(countable) An instance of this; a moment of being impertinent.
(uncountable) The fact or character of being out of place; inappropriateness.