undermine

verb

un·​der·​mine ˌən-dər-ˈmīn 

ˈən-dər-ˌmīn

undermined; undermining; undermines

transitive verb

1

: to subvert or weaken insidiously or secretly

trying to undermine his political rivals

2

: to weaken or ruin by degrees

3

: to wash away supporting material from under

4

: to excavate the earth beneath : form a mine under : sap

Choose the Right Synonym for undermine

weaken, enfeeble, debilitate, undermine, sap, disable mean to lose or cause to lose strength or vigor.

weaken may imply loss of physical strength, health, soundness, or stability or of quality, intensity, or effective power.

a disease that weakens the body's defenses

enfeeble implies a condition of marked weakness and helplessness.

enfeebled by starvation

debilitate suggests a less marked or more temporary impairment of strength or vitality.

the debilitating effects of surgery

undermine and sap suggest a weakening by something working surreptitiously and insidiously.

a poor diet undermines your health

drugs had sapped his ability to think

disable suggests bringing about impairment or limitation in a physical or mental ability.

disabled by an injury sustained at work

Examples of undermine in a Sentence

She tried to undermine my authority by complaining about me to my boss.

The events of the past year have undermined people's confidence in the government.

Recent Examples on the Web

Even after the revolution, prominent Sudanese preacher Abdulhay Yousif said the establishment of a women’s football league was aimed at undermining religion. —ABC News, 17 June 2026

The notion of a shadow chair was a plan Bessent proposed in 2024 to undermine Powell by having the president nominate a successor early. —Jeff Cox, CNBC, 17 June 2026

In a highly unusual move, the US Justice Department has urged a federalcourt to throw out a lawsuit against Elon Musk’s company xAI for its use of polluting gas turbines — sparking concerns the government is trying to undermine the ability of individuals or communities to sue polluters. —Laura Paddison, CNN Money, 17 June 2026

But the move continues to undermine California’s offshore wind ambitions. —Los Angeles Times, 17 June 2026

Word History

First Known Use

14th century, in the meaning defined at sense 4

Rhymes for undermine

• alkaline
• andesine
• anodyne
• anticline
• arginine
• asinine
• benzidine
• borderline
• byzantine
• calamine
• caroline
• centerline

Kids Definition

undermine

verb

un·​der·​mine ˌən-dər-ˈmīn 

1

: to dig out or wear away the earth beneath

undermine a wall

2

: to weaken or ruin secretly or gradually

undermine a government