impetuses

/IH1 M P AH0 T AH0 S IH0 Z/
noun
  1. 1

    Something that impels; a stimulating factor.

    โ€œThe outbreak of World War II in 1939 gave a new impetus to receiver development.โ€

  2. 2

    A force, either internal or external, that impels; an impulse.

  3. 3

    The force or energy associated with a moving body; a stimulus.

  4. 4

    An activity in response to a stimulus.

Source: https://en.wiktionary.org/wiki/impetus, https://en.wiktionary.org/wiki/impetuses