impulsion

/ɪmˈpʌlʃən/
noun
  1. A strong, sudden urge or desire to do something.
    • His impulsion to speak out surprised even himself.
    • The impulsion to buy the expensive watch was hard to resist.
    • She felt a sudden impulsion to jump into the cold lake.
  2. A force that causes something to move or happen; a driving force.
    • The rocket's impulsion came from its powerful engines.
    • The impulsion of the wind pushed the sailboat forward.
    • Curiosity was the main impulsion behind her scientific research.
Antonyms