undermine Syllabification: (un·der·mine)Pronunciation: /ˌəndərˈmīn, ˈəndərˌmīn/Translate undermine | into French | into German | into Italian | into Spanish Definition of undermine verb [with object] 1erode the base or foundation of (a rock formation). dig or excavate beneath (a building or fortification) so as to make it collapse. 2damage or weaken (someone or something), especially gradually or insidiously:this could undermine years of hard workDerivatives underminer noun Origin: Middle English: from under- + the verb mine2, probably suggested by Middle Dutch onderminerenundermine in other Oxford dictionaries Definition of undermine in the British & World English dictionary
