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invalidate

in·val·i·date

invalidate

 
pronunciation:
ihn vae lih deIt
features:
Word Parts
part of speech: transitive verb
inflections: invalidated, invalidates, invalidating
definition: to make invalid; deprive of force or effect.
Unfortunately, the new evidence appears to invalidate our theory.
synonyms:
annul, nullify, quash, rescind, vitiate, void
antonyms:
validate
similar words:
abolish, abrogate, cancel, countermand, destroy, discredit, disprove, negate, negative, remit, repeal, revoke, veto
derivations: invalidation (n.), invalidator (n.)
Word Parts
The word invalidate contains the following part: