undermine
Americanverb (used with object)
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to injure or destroy by insidious activity or imperceptible stages, sometimes tending toward a sudden dramatic effect.
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to attack by indirect, secret, or underhand means; attempt to subvert by stealth.
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to make an excavation under; dig or tunnel beneath, as a military stronghold.
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to weaken or cause to collapse by removing underlying support, as by digging away or eroding the foundation.
verb
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(of the sea, wind, etc) to wear away the bottom or base of (land, cliffs, etc)
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to weaken gradually or insidiously
their insults undermined her confidence
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to tunnel or dig beneath
Other Word Forms
- underminer noun
Etymology
Origin of undermine
First recorded in 1300–50; Middle English underminen; under-, mine 2
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In movies of the era, female higher-ups are often depicted as undermining or feeling threatened by junior women.
By leveraging the threat of costly and unpredictable litigation, dominant firms burden their competitors financially and create uncertainty that undermines customer confidence in those rivals—ultimately steering business and market share toward themselves.
This has undermined the crypto camp’s claim to offer users secure access to their funds.
From Los Angeles Times
They were removed from the Hunter case, undermined by superiors, denied advancement.
"These attacks must stop," they added, saying they risked undermining plans to end the Gaza war and prospects for long-term peace.
From Barron's
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
