Impetus: meaning, definitions and examples

Use 'impetus' to describe something that provides the energy or force necessary to make something happen, often used formally or in writing.

• The new law gave fresh impetus to the development of sustainable technologies

Use 'motivation' to describe the reason or reasons someone has for acting or behaving in a particular way, used both formally and informally.

• Students often need extra motivation to study hard for their exams

Use 'drive' to describe strong motivation or determination within a person to achieve something, often used in everyday conversations.

• Her drive to succeed in her career is truly inspiring

Use 'stimulus' to refer to something that incites activity or growth, often used in economic or scientific contexts.

• The government provided a financial stimulus to boost the economy during the recession

Typically used to describe a force or influence that makes something happen or progress. It often refers to motivation or encouragement that prompts further action.

• The new policy provided fresh impetus for economic growth
• Her speech gave a new impetus to the campaign

Used in both physical sciences to describe the quantity of motion of a moving body and in everyday language to indicate increasing progress or movement in an activity.

• The project gained momentum after the initial success
• The car gained momentum as it rolled down the hill

Refers to a strong push or driving force, often used in mechanical or military contexts. It can also mean the main point or driving argument in discussions.

• The rocket's engines provided enough thrust to break the Earth's atmosphere
• The main thrust of his argument was security

Often refers to a sudden, strong desire or movement that isn't based on rational planning. It has a more spontaneous and sometimes negative connotation.

• She bought the dress on impulse
• His impulse to snap back was hard to control