To put an end to, especially formally and with authority

• extinguish

  1. To put an end to; destroy or cause to die out
  2. (Psychology) To bring about the extinction of a conditioned response.
  3. To cause a fire or light to stop burning or shining; put out.

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  1. To put an end to; destroy or cause to die out
  2. (Psychology) To bring about the extinction of a conditioned response.
  3. To cause a fire or light to stop burning or shining; put out.

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• void

  1. To leave; vacate.
  2. To take out (the contents of something); empty.
  3. To make void or of no validity; invalidate:

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  1. To leave; vacate.
  2. To take out (the contents of something); empty.
  3. To make void or of no validity; invalidate:

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• vitiate

  1. To reduce the value or quality of; impair or spoil:
  2. To make ineffective (a contract or legal stipulation, for example); invalidate.
  3. To weaken morally; debase; pervert

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  1. To reduce the value or quality of; impair or spoil:
  2. To make ineffective (a contract or legal stipulation, for example); invalidate.
  3. To weaken morally; debase; pervert

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• set-aside

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• negate

  1. To make negative:
  2. (Computers) To perform the machine logic operation NOT gate.
  3. To deny the existence or truth of

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  1. To make negative:
  2. (Computers) To perform the machine logic operation NOT gate.
  3. To deny the existence or truth of

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• invalidate

  1. To make invalid; deprive of legal force

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  1. To make invalid; deprive of legal force

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• cancel

  1. To do away with; wipe out; abolish, withdraw, etc.
  2. To cross out with lines or other marks, as in deleting written matter or marking a check as used and cleared
  3. To offset or cancel each other

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  1. To do away with; wipe out; abolish, withdraw, etc.
  2. To cross out with lines or other marks, as in deleting written matter or marking a check as used and cleared
  3. To offset or cancel each other

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• annul

  1. To make or declare void or invalid, as a marriage or a law; nullify.
  2. To bring to an end the effect or existence of; cancel out:

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  1. To make or declare void or invalid, as a marriage or a law; nullify.
  2. To bring to an end the effect or existence of; cancel out:

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• annihilate

  1. (Physics) To participate in annihilation. Used of particles and antiparticles.
  2. To destroy completely:
  3. To consider or cause to be of no importance or without effect; nullify

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  1. (Physics) To participate in annihilation. Used of particles and antiparticles.
  2. To destroy completely:
  3. To consider or cause to be of no importance or without effect; nullify

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• abrogate

  1. To abolish, do away with, or annul, especially by authority:
  2. To cancel or repeal by authority; annul

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  1. To abolish, do away with, or annul, especially by authority:
  2. To cancel or repeal by authority; annul

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• abolish

  1. To do away with completely; put an end to; esp., to make (a law, etc.) null and void
  2. (Archaic) To destroy completely.
  3. To do away with; put an end to; annul:

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  1. To do away with completely; put an end to; esp., to make (a law, etc.) null and void
  2. (Archaic) To destroy completely.
  3. To do away with; put an end to; annul:

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To make ineffective by applying an opposite force or amount

• neutralize

  1. (Slang) To remove as a threat, especially by killing.
  2. To counterbalance or counteract the effect of; render ineffective.
  3. To cause (an acid or base) to undergo neutralization.

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  1. (Slang) To remove as a threat, especially by killing.
  2. To counterbalance or counteract the effect of; render ineffective.
  3. To cause (an acid or base) to undergo neutralization.

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• negate

  1. To deny the existence or truth of
  2. (Computers) To perform the machine logic operation NOT gate.
  3. To make negative:

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  1. To deny the existence or truth of
  2. (Computers) To perform the machine logic operation NOT gate.
  3. To make negative:

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• counteract

  1. To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
  2. To act directly against; check, neutralize, or undo the effect of with opposing action

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  1. To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
  2. To act directly against; check, neutralize, or undo the effect of with opposing action

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• cancel

  1. To print or stamp marks on (a postage stamp) as by machine or handstamp, to prevent reuse
  2. (Math.) To remove (a common factor from both terms of a fraction, equivalents of opposite sign or on opposite sides of an equation, etc.)
  3. To offset or cancel each other

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  1. To print or stamp marks on (a postage stamp) as by machine or handstamp, to prevent reuse
  2. (Math.) To remove (a common factor from both terms of a fraction, equivalents of opposite sign or on opposite sides of an equation, etc.)
  3. To offset or cancel each other

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