Invalidate Definition

ĭn-vălĭ-dāt
invalidated, invalidates, invalidating
verb
invalidated, invalidates, invalidating
To make invalid; deprive of legal force.
Webster's New World
Antonyms:

Origin of Invalidate

  • From in- +‎ Latin valere (“to be strong”); literally, “to make not strong”.

    From Wiktionary

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invalidate