You can't just undo years of being trained to be a pawn.

The dogs could undo years of work by staff and volunteers, he said.

This brings with it a risk we will revert to institutional services and undo years of good work.

She told the Today programme Labour were trying to undo years of damage caused by the Conservative party.

But, despite a worldwide drop in Aids-related deaths and improved access to antiretroviral drugs, a funding shortfall threatens to undo years of work.

For him, the repeated banlieue action plans were useful lifelines but not enough to undo years of an unofficial policy of segregation by the state.

After pledging to pacify the favelas, is a new policy undoing years of hard work?

That would boost the crown, undoing years of hard work on inflation by pushing down import prices.