im·pe·tus
ˈimpədəs/
noun
noun: impetus
- the force or energy with which a body moves.
"hit the booster coil before the flywheel loses all its impetus"
- the force that makes something happen or happen more quickly.plural noun: impetuses
synonyms: motivation, stimulus, incitement, incentive, inducement, inspiration, encouragement, boost, fillip, springboard;
informala shot in the arm
"the forces were given fresh impetus"