- (of the sea, wind, etc) to wear away the bottom or base of (land, cliffs, etc)
- to weaken gradually or insidiously: their insults undermined her confidence
- to tunnel or dig beneath
WordReference Random House Learner's Dictionary of American English © 2019
un•der•mine /ˌʌndɚˈmaɪn/USA pronunciation v. [~ + object], -mined, -min•ing.WordReference Random House Unabridged Dictionary of American English © 2019
un•der•mine (un′dər mīn′ or, esp. for 1, 2, 4, un′dər mīn′),USA pronunciation v.t., -mined, -min•ing.
Collins Concise English Dictionary © HarperCollins Publishers::
undermine /ˌʌndəˈmaɪn/ vb (transitive)
'undermine' also found in these entries:
Collocations: undermined her [authority, position, confidence, health], [attempt, seek, try] to undermine her (authority), [his position] was undermined, more...
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