The nervous processes of an impulsive being, are less remote from reflex actions than are those of an unimpulsive being.
Mercy combined, in a very singular manner, some of the traits of an impulsive nature with those of an unimpulsive one.
These are in themselves very interesting, as showing the quiet, orderly, unimpulsive manner in which the French Canadians live.
early 15c., originally in reference to medicine that reduces swelling or humors, from Middle French impulsif or directly from Medieval Latin impulsivus, from Latin impuls-, past participle stem of impellere (see impel). Of persons, "rash, characterized by impulses," from 1847.
impulsive im·pul·sive (ĭm-pŭl'sĭv)
Inclined or tending to act on impulse rather than thought.
Motivated by or resulting from impulse.