impetuous

Making arbitrary decisions, especially in an impulsive and forceful manner.

But it was natural, that the impetuous, restless young artist should incline more to excess of strength than of delicacy in his playing.

The shrewd kind confidant used gently to hint the sad fact to the impetuous hero of this piece. The impetuous hero knew this quite well.

Characterized by sudden violence or vehemence.

For with ſuch puiſſance and impetuous maine / Thoſe Champions broke on them, that forſt the fly, / Like ſcattered Sheepe, whenas the Shepherds ſwaine / A Lyon and a Tigre doth eſpye, / With greedy pace forth ruſhing from the foreſt nye.

[…]and the Thunder, / Wing'd with red Lightning and impetuous rage, / Perhaps hath ſpent his ſhafts […]