undoing

The new president spent the first year undoing the work of his predecessor.

She has invented a nifty little gadget for undoing stubborn nuts and bolts.

Her constant lying was her undoing.

Procrastination is the undoing of many goals.

His lack of preparation proved to be his undoing.

The scandal was the undoing of his political career.

Overconfidence can be one's undoing.

The lack of communication was their undoing.

Her arrogance was her undoing in the competition.

The betrayal of trust was the undoing of their friendship.

The company's financial mismanagement was its undoing.

His inability to adapt was his undoing in the new job.