impetus
noun
[ ˈɪmpɪtəs ]
• the force or energy with which a body moves.
• "hit the booster coil before the flywheel loses all its impetus"
Similar:
momentum,
propulsion,
impulsion,
impelling force,
motive force,
driving force,
drive,
thrust,
continuing motion,
energy,
force,
power,
push,
steam,
strength,
Origin:
mid 17th century: from Latin, ‘assault, force’, from impetere ‘assail’, from in- ‘towards’ + petere ‘seek’.