infest

The verb infest means to invade in large number, often resisting control and causing damage or hardship. Bedbugs can infest people's belongings and even their bodies, or mice may infest your kitchen if you leave the cheese out too often.

Infest comes from Latin: in- means "not" and festus means "able to be seized." So infest describes something is not able to be seized, typically because it's present in such large numbers. For example, mosquitoes may infest your backyard during the summer and annoy you when you're trying to relax. Infest is usually used to describe pests, such as bugs or rodents, that overrun something in such large number that they are difficult to control.

Definitions of infest
1

v occupy in large numbers or live on a host

“the Kudzu plant infests much of the South and is spreading to the North”
Synonyms:
invade, overrun
Type of:
inhabit
be present in

v invade in great numbers

“the roaches infested our kitchen”
Synonyms:
overrun
Type of:
invade, occupy
march aggressively into another's territory by military force for the purposes of conquest and occupation

v live on or in a host, as of parasites

Type of:
inhabit
be present in

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