impetuosity

noun2

1. •
   The quality of making rash or arbitrary decisions, especially in an impulsive or forceful manner.
2. •
   The condition or quality of being impetuous, impatient; fury; violence.

   • Again his lordship began his long and deliberate perusal, while Henrietta watched the slow motion of his eyes with a degree of impetuosity she could scarcely repress. — 1837