All their plans came to naught (=failed).naughtnaught /nɔːt $ nɒːt/ pronoun old use 
All their plans came to naught (=failed).
WORD ORIGINnaught
Origin:
Old English nawihtCOLLOCATIONS FROM THE ENTRY All their plans came to naught (=failed).
nothing: All their plans came to naught (=failed). All their plans came to naught (=failed).