Definitions

prevent

[pri-vent] / prɪˈvɛnt /

VERB

keep from happening or continuing

Synonyms

STRONGEST

avert avoid bar block counter forbid forestall halt hamper hinder impede inhibit limit preclude prohibit put an end to restrain restrict rule out stop thwart ward off

STRONG

anticipate arrest baffle balk check chill cool cork counteract dam debar foil forfend frustrate intercept interdict interrupt obstruct obviate repress retard

WEAK

dead-end defend against head off hold back hold off keep lid on nip in the bud put a stop to shut out stave off turn aside

Antonyms

STRONGEST

advance aid allow approve assist continue encourage facilitate forward free help let go open permit promote push release support

STRONG

abet heat liberate warm

WEAK

cause

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Tiny differences in values such as the electron charge or the strength of fundamental forces could prevent stars from forming heavy elements needed for planets and life.

From Science Daily • May 8, 2026

There are also plans for temporary flexibility on airport slots to prevent airlines that exceptionally give up slots because of high fuel costs from being penalised in future slot allocations.

From Barron's • May 7, 2026

Drug makers in recent years have attempted to limit the number of contract pharmacies to which they provide discounts to prevent abuse.

From The Wall Street Journal • May 7, 2026

A campaigner has lost a High Court bid to try to prevent several music festivals going ahead at Brockwell Park, in Lambeth, south London.

From BBC • May 7, 2026

“And you put him up to it, governess? To prevent me from marrying Hortense?”

From "The Unseen Guest" by Maryrose Wood

Vocabulary lists containing prevent

"Handle with Care"

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The Search Is Over: Synonyms for "Stop"

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1.7.B Using Ice to Keep Orange Groves Warm

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