Standard Lemma guide

infest

adj · noun · verb · 7 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ɪnˈfɛst/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛst
  • CMU ARPABET: IH2 N F EH1 S T Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Mischievous; hurtful; harassing.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Hostility.

Definition source: English Wiktionary via Wiktextract

Usage: obsolete, uncountable

Examples

  • 1590, Edmund Spenser, The Faerie Queene, Book II, Canto Eleven, Stanza 32, Hackett, 2006, p. 191, Like as a fire, the which in hollow cave Hath long bene underkept, and down supprest, With murmurous disdayne doth inly rave, And grudge, in so streight prison to be prest, At last breakes forth with furious infest, And strives to mount unto his native seat [...]

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To inhabit a place in unpleasantly large numbers; to plague, harass.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • Insects are infesting my basement!

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To invade a host plant or animal.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

invade in great numbers

Definition source: Princeton WordNet 3.0

Examples

  • the roaches infested our kitchen

Meaning relationships

Synonyms: overrun

Antonyms: none provided

Broader terms: invade, occupy

6

verb

Meaning 6

live on or in a host, as of parasites

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: inhabit

7

verb

Meaning 7

occupy in large numbers or live on a host

Definition source: Princeton WordNet 3.0

Examples

  • the Kudzu plant infests much of the South and is spreading to the North

Meaning relationships

Synonyms: invade, overrun

Antonyms: none provided

Broader terms: inhabit

History

Etymology

From Middle English infesten, from Old French infester (“to infest”), from Latin īnfestō (“assail, molest”, verb), from īnfestus (“hostile”), of uncertain origin.

Across languages

Translations

14 source translations are retained for this English entry.

  • Bulgarian: гъмжа (gǎmža) — to inhabit a place in large numbers
  • Czech: zamořit — to inhabit a place in large numbers
  • Galician: infestar — to inhabit a place in large numbers
  • German: befallen — to inhabit a place in large numbers
  • Hungarian: ellep — to inhabit a place in large numbers
  • Hungarian: eláraszt — to inhabit a place in large numbers
  • Hungarian: elszaporodik — to inhabit a place in large numbers
  • Hungarian: nyüzsög — to inhabit a place in large numbers
  • Hungarian: hemzseg — to inhabit a place in large numbers
  • Māori: mui — to inhabit a place in large numbers
  • Māori: pokipoki — to inhabit a place in large numbers
  • Portuguese: infestar — to inhabit a place in large numbers
  • Slovak: zamoriť — to inhabit a place in large numbers
  • Yiddish: פֿאַרשרצן (farsheretsn) — to inhabit a place in large numbers