Black allows the opponent to expand in the center with the intention of undermining it by pressure from the flanks.

The internal strife had threatened to undermine financial support for public television from Congress and private sources.

At that time, a fierce storm undermined his effort less than 400 miles from the finish.

He appears to be undermining his own organisation from the inside.

"This administration has been undermining abortion rights from the day it took office."

"All he has to do is undermine and weaken the Empire from the inside- long enough for the rebels to win a decisive victory."

The swamp, thought Hubert, had probably begun to undermine it from the rear.

It undermined the Department's record of independence from party politics.

Oil represents money, arms and power that can be used to undermine everything from Western economies to Israeli security.

It is argued that they tried to undermine the technical school from the outset to preserve their own position.