infest

verb

in·​fest in-ˈfest How to pronounce infest (audio)
infested; infesting; infests

transitive verb

1
: to spread or swarm in or over in a troublesome manner
a slum infested with crime
shark-infested waters
2
: to live in or on as a parasite
infestant noun
infestation noun
infester noun

Examples of infest in a Sentence

in desperation, we called in an exterminator because the house was infested with ants
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Clean Up Foliage Remove any damaged or infested parts of your plants. Macie Stump, Southern Living, 12 Dec. 2024 Photo: Jeenah Moon/The Washington Post via Getty Images Unlike the series of plagues Yahweh unleashed on the Egyptians in the Book of Exodus, our world has become infested with something far more annoying: celebrity look-alike contests. Michael Savio, Vulture, 15 Nov. 2024 In addition to the body, the unfurnished apartment had soiled carpet and was infested with flies and roaches. Alexis Simmerman, Austin American-Statesman, 13 Nov. 2024 Other types of beetles, such as bark beetles, also occasionally infest wet areas of a home. Arricca Elin Sansone, Southern Living, 21 Nov. 2024 See all Example Sentences for infest 

Word History

Etymology

French infester, from Latin infestare, from infestus hostile

First Known Use

1602, in the meaning defined at sense 1

Time Traveler
The first known use of infest was in 1602

Dictionary Entries Near infest

Cite this Entry

“Infest.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infest. Accessed 21 Dec. 2024.

Kids Definition

infest

verb
in·​fest in-ˈfest How to pronounce infest (audio)
1
: to spread or swarm in or over in a troublesome manner
a neighborhood infested with crime
shark-infested waters
2
: to live in or on as a parasite
horses infested with worms
infestation noun

Medical Definition

infest

transitive verb
in·​fest in-ˈfest How to pronounce infest (audio)
: to live in or on as a parasite
the flea that infests cats
horses infested with worms
compare infect

More from Merriam-Webster on infest

Last Updated: - Updated example sentences
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