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undermining

American  
[uhn-der-mahy-ning] / ˈʌn dərˌmaɪ nɪŋ /

noun

  1. the act or process of injuring, attacking, or destroying something or someone indirectly or by imperceptible degrees, often leading to a dramatic collapse.

    The undermining of Scottish Gaelic as a viable language resulted not from decrees, but from a gradual weakening of independent Scottish institutions.

  2. the act or process of weakening something or causing it to collapse by removing its underlying support, as by erosion.

    During the heavy rains, blocked sewers caused the flooding of the basement and the undermining of the wall by water.

  3. the act of digging or tunneling underneath something, as a military stronghold.

    The siege works were now close enough to allow the undermining of some of the bastions of the fortress.


adjective

  1. weakening something or someone gradually or indirectly.

    Seating students in rows, so they cannot see each other’s faces, has an undermining effect on their engagement.

  2. digging or tunneling underneath something, or removing or eroding its underlying support.

    The land along the shoreline collapsed because of undermining waves and currents.

Other Word Forms

Derived Forms

Etymology

Origin of undermining

First recorded in 1350–1400; undermin(e) ( def. ) + -ing 1 ( def. ) for the noun senses; undermin(e) ( def. ) + -ing 2 ( def. ) for the adjective senses

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.

The findings, published in Conservation Letters, suggest that governments risk undermining conservation gains when they fail to address the long-term financial and social costs that wildlife recovery can place on local residents.

From Science Daily • Jun. 1, 2026

She added that the impact of rural crime extended "beyond financial loss, undermining trust and connection, often leaving a trauma that can remain with farmers, their families and wider communities for a lifetime".

From BBC • May 30, 2026

South Africa's international standing has meanwhile been dented, undermining its post-apartheid image as a champion of human rights and African solidarity.

From Barron's • May 22, 2026

Keke Palmer, Naomi Ackie and Taylour Paige play shoplifters undermining the powers that be in a zany, visually uninhibited comedy written and directed by Boots Riley.

From Los Angeles Times • May 22, 2026

“There are too many for the bunker already, and I don’t think I can make it any bigger, not without undermining the house or falling into the cellar.”

From "The Light in Hidden Places" by Sharon Cameron

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