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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.

Before departing with a delegation for Shanghai, Cheng told journalists that Taiwan "must do everything in our power to prevent war from breaking out".

From Barron's • Apr. 7, 2026

The article suggests warming up, protecting the spine with hip mobility and core strength, and addressing early pain to prevent injury progression.

From The Wall Street Journal • Apr. 6, 2026

The centres will aim to help young people aged up to 18 with employment advice, health and wellbeing and prevent them from falling into a life of crime.

From BBC • Apr. 6, 2026

There is growing demand for treatments that can safely prevent and reverse bone loss over time.

From Science Daily • Apr. 6, 2026

It was the moment at which the end was written: the moment at which there was nothing left to prevent.

From "The Big Short" by Michael Lewis

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.