1) Most election promises can be set at naught.

2) He set at naught all my good advice.

3) He set at naught all his parents'good advice.

4) All our plans may yet be set at naught.

5) Her dream of becoming a film star was set at naught after a car accident.

6) All our victories are set at naught if we lose sight of our principles.

7) Henceforward all my doubts and fears are set at naught for ever.