Our careful calculations were brought to nought when new data showed the model was flawed.

Her careful plan for the campaign comes to nought when the key supporter withdraws.

The committee's relentless objections are bringing to nought the years of careful planning.

Despite months of effort, their carefully planned launch came to nought when the product failed safety tests.

Despite months of careful planning, their hopes are coming to nought as funding dries up.

One careless remark brings to nought months of hard work.

He calls his parents more often than nought, just to check they're doing well.