undermine Meaning in the Cambridge English Dictionary
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Meaning of “undermine” in the English Dictionary

"undermine" in British English

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undermineverb [T]

uk   /ˌʌn.dəˈmaɪn/  us   /-dɚ-/
C2 to make someone less ​confident, less ​powerful, or less ​likely to ​succeed, or to make something ​weaker, often ​gradually: The ​president has ​accused two ​cabinetmembers of ​workingsecretly to undermine his ​position/him. Criticism just undermines ​theirconfidence.
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(Definition of undermine from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"undermine" in American English

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undermineverb [T]

 us   /ˌʌn·dərˈmɑɪn/
to ​graduallyweaken or ​destroy someone or something: The ​incompetence and ​arrogance of the city’s ​administration have undermined ​publicconfidence in ​government.
(Definition of undermine from the Cambridge Academic Content Dictionary © Cambridge University Press)
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