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undermine

[ uhn-der-mahyn or, especially for 1, 2, 4, uhn-der-mahyn ]
/ 藢蕦n d蓹r藞ma瑟n or, especially for 1, 2, 4, 藞蕦n d蓹r藢ma瑟n /
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See synonyms for: undermine / undermined / undermines / undermining on Thesaurus.com

verb (used with object), un路der路mined, un路der路min路ing.
to injure or destroy by insidious activity or imperceptible stages, sometimes tending toward a sudden dramatic effect.
to attack by indirect, secret, or underhand means; attempt to subvert by stealth.
to make an excavation under; dig or tunnel beneath, as a military stronghold.
to weaken or cause to collapse by removing underlying support, as by digging away or eroding the foundation.
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Origin of undermine

First recorded in 1300鈥50, undermine is from the Middle English word underminen.See under-, mine2

OTHER WORDS FROM undermine

un路der路min路er, nounun路der路min路ing路ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2021

How to use undermine in a sentence

British Dictionary definitions for undermine

undermine
/ (藢蕦nd蓹藞ma瑟n) /

verb (tr)
(of the sea, wind, etc) to wear away the bottom or base of (land, cliffs, etc)
to weaken gradually or insidiouslytheir insults undermined her confidence
to tunnel or dig beneath

Derived forms of undermine

underminer, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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