impulsive

Inclined to act on impulse rather than thought.

Motivated by or resulting from impulse.

Having force or power to impel or incite; forceful.

Acting within brief time intervals. Used especially of a force.

Having the power of driving or impelling; moving; impellent.

Actuated or controlled by impulses; swayed by the emotions: as, an impulsive child.

Resulting from impulse: as, impulsive movements or gestures.

In mech., acting by instantaneous impulse, not continuously: said of forces. See force, 8 .

That which impels; impelling cause or reason.

Having the power of driving or impelling; giving an impulse; moving; impellent.