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infest

[in-fest] /ɪnˈfɛst/
verb (used with object)
1.
to live in or overrun to an unwanted degree or in a troublesome manner, especially as predatory animals or vermin do:
Sharks infested the coastline.
2.
to be numerous in, as anything undesirable or troublesome:
the cares that infest the day.
3.
Archaic. to harass.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Latin infestāre to assail, molest, derivative of infestus hostile
Related forms
infester, noun
reinfest, verb (used with object)
uninfested, adjective
Can be confused
infect, infest, invest.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for infester

infest

/ɪnˈfɛst/
verb (transitive)
1.
to inhabit or overrun in dangerously or unpleasantly large numbers
2.
(of parasites such as lice) to invade and live on or in (a host)
Derived Forms
infestation, noun
infester, noun
Word Origin
C15: from Latin infestāre to molest, from infestus hostile
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for infester

infest

v.

late 15c., "to attack, assail, hurt, distress, annoy," from Middle French infester, from Latin infestare "to attack, disturb, trouble," from infestus "hostile, dangerous," originally "inexorable, not able to be handled," from in- "not, opposite of" (see in- (1)) + -festus "(able to be) seized." Sense of "swarm over in large numbers" first recorded c.1600. Related: Infested; infesting.

Online Etymology Dictionary, © 2010 Douglas Harper
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infester in Medicine

infest in·fest (ĭn-fěst')
v. in·fest·ed, in·fest·ing, in·fests

  1. To live as a parasite in or on tissues or organs or on the skin and its appendages.

  2. To inhabit or overrun in numbers large enough to be harmful, threatening, or obnoxious.


in'fes·ta'tion n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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