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invalidate

Verbs

• (v) declare invalid
  • The contract was annulled
  • void a plea
  annul, nullify, void, quash, avoid,
• (v) make invalid for use
  • cancel cheques or tickets
  cancel,
• (v) show to be invalid nullify,
• (v) take away the legal force of or render ineffective
  • invalidate a contract
  vitiate, void,

Synonyms

annul nullify void quash avoid cancel vitiate

Antonyms

validate formalise formalize

Words of close approximity