impetus
IM-puh-tuss
/ˈɪm.pɪ.təs/
The force or energy with which a body moves; a driving force or impulse that causes action.
Emphasizes momentum, push, or the catalyst that accelerates an ongoing or new initiative.
The story behind the word. Latin 'impetus' combined 'in-' (into) and 'petere' (to rush at or aim for). It originally meant a physical assault or charging forward in battle, before evolving to describe any force that drives an event forward.
Word relationships
- catalyst: A catalyst starts a reaction without being consumed, while impetus is the momentum pushing it forward.
- momentum: Momentum is sustained movement, whereas impetus includes the initial striking force.
- impediment: An impediment blocks or slows progress.
- stagnation: Stagnation is a state of standing still without energy.
Commonly confused with
- impulse: Impulse is a sudden unreflective desire, whereas impetus is a driving momentum behind progress.
Word family
- impetuous (adjective): Acting quickly without thought (historical derivative).
Collocations
- gain impetus
- give impetus to
- main impetus
- fresh impetus
Example sentences
- "The invention of the printing press gave fresh impetus to the spread of scientific ideas across Europe." Historical analysis
- "The environmental crisis provided the impetus needed for reform." Policy development
Memory hook
IMPETUS = IMPETus gives PETROL (fuel) to your movement. Driving energy.
When not to use
Do not use for static plans or long-term personal values; impetus implies dynamic motion or shock.
Fun facts
- Physics once used 'impetus' as a technical term for momentum before Isaac Newton formalized modern mechanics terms.
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