Un`der*mine" (?), v. t. 1. To
excavate the earth beneath, or the part of, especially for the purpose of causing to fall or be overthrown; to form a mine under; to sap;
as, to undermine a wall. A vast rock undermined from one end
to the other, and a highway running through it.
Addison. 2. Fig.:
To remove the foundation or support of
by clandestine means; to ruin in an underhand way; as, to undermine reputation; to undermine the constitution of the state.
He should be warned who are like to
undermine him. Locke.
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