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.

To excavate beneath a structure.

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.

Skin edges of a wound that have lost supporting tissue under intact skin.

Undermine is a fictional character in the series. His name in Transformers: Galaxy Force is Dino Shout. His alternate mode is a Spinosaurus.

destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war"

hollow out as if making a cave or opening; "The river was caving the banks"