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- Dictionaryundermine/ˌʌndəˈmʌɪn/
verb
- 1. erode the base or foundation of (a rock formation): "the flow of water had undermined pillars supporting the roof" Similar Opposite
- 2. lessen the effectiveness, power, or ability of, especially gradually or insidiously: "this could undermine years of hard work" Similar Opposite
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