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Definition of infest

infest

/ɪnˈfɛst/
in · fest

Adjective:infested
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Past Simple:infested
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Past Participle:infested
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Present Participle:infesting
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infest Lexical Profile

infest Game Scores & Validity

• verb

1

To be present in a place or on a host in large, troublesome numbers, typically so as to cause damage or disease (especially of insects, parasites, or vermin).

Example

"Drywood termites can quickly infest the wooden beams of an older house if left untreated."


2

To pervade, haunt, or trouble a place or organization in an unwelcome or harmful way.

Example

"Smugglers and pirates continued to infest the coastal shipping lanes throughout the seventeenth century."

Synonyms
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Antonyms
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Word Nuance & Usage

"Infest" is most commonly used in the passive voice (e.g., "a house infested with mice") and carries a strongly negative connotation of pests, disease, or undesirable intruders.

• Rhymes for infest

Word Origin & Etymology

Borrowed in the late 15th century from Middle French infester, from Latin infestare ("to attack, trouble, or annoy"), derived from infestus ("hostile, unsafe, or disturbed").

Cite this Entry


Wordmom. (2026). Definition of Infest. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/infest
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