Definition: [verb] offer goods or services at a lower price than (a competitor).
Example: these industries have been undercut by more efficient foreign producers
Definition: [verb] cut or wear away the part below or under (something, especially a cliff).
Example: the base of the crag is undercut permitting walkers to pass behind the falling water
Definition: [verb] weaken; undermine.
Example: the chairman denied his authority was being undercut
Definition: [verb] strike (a ball) with backspin so that it bounces high on landing.