Impetus

noun (countable and uncountable)
/ˈɪm.pɪ.təs/
A driving force or stimulus that causes a process, movement, or activity to begin, gather momentum, or become more vigorous. Commonly used as the motivating cause that propels an effort forward (e.g., "the report gave fresh impetus to reform").

✍️ Usage in a UPSC answer

The Goods and Services Tax, for all its early frictions, gave fresh impetus to the project of fiscal federalism by compelling the Centre and the States to negotiate a common indirect-tax architecture through the GST Council.

Synonyms

stimulusimpulsemomentumspurdriveincentive

Antonyms

hindranceimpedimentdeterrentobstruction

🌱 Word Family

impetuous (adj), impetuously (adv), impetuosity (n), impetuousness (n)

🔡 Root

Latin impetus = assault, rapid motion; impetere = to attack; in- = upon + petere = to aim for, rush at

📜 Etymology

From Latin impetus "an assault, attack, rapid motion, impulse, force," from impetere "to attack," from assimilated form of in- "into, upon" + petere "to aim for, rush at, seek." Entered English in the mid-17th century.

🧠 Memory Hook

Think "IMPET-us" → an "impetuous" person rushes forward; the shared Latin root petere ("to rush at") gives an IMPETUS its forward push — the thing that makes you rush ahead.

🎯 How This Word Works in UPSC Writing

The force or stimulus that drives something forward. It is a serviceable word in GS3 for describing what accelerated a trend, as in an impetus to formalisation or to digital payments. Like many such words it is strongest when the impetus is named and weakest when merely asserted, so an answer should identify the specific policy or event supplying the push.

⚖️ Don’t Confuse It With

Impetus is the driving force behind movement. Momentum is the continuation of movement once under way. Catalyst accelerates a process without being consumed. Trigger initiates an event, usually suddenly.

🇮🇳 Hindi Meaning

प्रेरणा (prernā) or गति (gati) in the sense of forward push.

Common Questions

What does impetus mean?
The force or stimulus that drives a process forward or causes it to accelerate.
How is impetus different from momentum?
Impetus is the push that starts or accelerates movement. Momentum is the continuation of that movement once it is already under way.

📝 Seen in UPSC Question Papers

Real UPSC previous-year questions whose text uses “Impetus” — proof this word earns its place on your list.

Relevant across:GS3 · Economy, Environment, S&T & Security

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Resources
Ujiyari Ujiyari — Current Affairs