INVALIDATE

invalidate. Invalidate, v.t. to weaken or lessen in force

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In‐val″i‐date (?), v. t. [imp. & p. p. Invalidated (?); p. pr. & vb. n. Invalidating.] [[From Invalid null.]] To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.