Wednesday Word: Impetus
1. the force or energy with which a body moves. "hit the booster coil before the flywheel loses all its impetus"
2. the force that makes something happen or happen more quickly. "the crisis of the 1860s provided the original impetus for the settlements"
mid 17th century: from Latin, ‘assault, force’, from impetere ‘assail’, from in- ‘towards’ + petere ‘seek’.
This is a very good, and easy, word to add to your everyday lexicon. It is, quite simply, something taht spurs action. the reason for something. The cause, motivation, purpose. There are so many reasons to use the word. The "impetus" to use the word is great and many.