annul

Verb

• cancel officially
  • He revoked the ban on smoking
    
  • lift an embargo
    
  • vacate a death sentence
    

• declare invalid
  • The contract was annulled
    
  • void a plea
    

Related words

• Synonyms: 
  revoke , lift , countermand , reverse , repeal , overturn , rescind , vacate , invalidate , quash , void , avoid , nullify
• Antonyms: 
  validate , formalize , formalise