undermine

Martin, for instance, had on one occasion undermined a tree sacred to old gods, then stood in the path of its fall, but forced it to fall elsewhere by making the sign of the Cross.

The war efforts were undermined by the constant bickering between the allies.

Services between Glasgow Queen Street and Edinburgh Waverley via Falkirk High are currently suspended, following a 30-metre breach of the Union Canal that occurred on August 12 after torrential rain and thunderstorms. The thousands of gallons of water that cascaded onto the railway line below washed away track, ballast and overhead line equipment, and undermined embankments along a 300-metre section of Scotland's busiest rail link.