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TOEFL BNC: 14319 COCA: 14552

invalidate

verb

in·​val·​i·​date (ˌ)in-ˈva-lə-ˌdāt How to pronounce invalidate (audio)
invalidated; invalidating; invalidates

transitive verb

: to make invalid
especially : to weaken or destroy the cogency of
invalidation noun
invalidator noun
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