- 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. - 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.
Meaning of 'undermine' (Princeton's WordNet)
1 . undermine
[ v]
Meaning (1): - destroy property or hinder normal operations
Example in sentence:
The Resistance sabotaged railroad operations during the war
Meaning (2): - hollow out as if making a cave or opening