Part of speech: verb

To excavate beneath.

Part of speech: verb

To wear away and weaken.

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Usage examples "undermine":

  1. Later criticism of His personal conduct and habits with the despised classes is mingled with an attempt to work upon His disciples and undermine their loyalty. - "Quiet Talks about Jesus", S. D. Gordon.
  2. Undermine the foundation, and still pretend that he desires the fabric to stand! - "The Rise and Fall of the Confederate Government, Vol. 1 (of 2)", Jefferson Davis.
  3. Does he not attempt with that to undermine his worth? - "Lucky Pehr", August Strindberg.