What is the opposite of invalidate?

Need antonyms for invalidate? Here's a list of opposite words from our thesaurus that you can use instead.

Verb
Opposite of to put an end to by formal action
Verb
Opposite of to make or prove (an argument, statement, or theory) unsound or erroneous
Verb
Opposite of to disprove or refute
“No evidence has been found to substantiate allegations that animals have been mistreated.”
Verb
(rare) Opposite of to put an end to formally or by law
“He tried to get out of his contract, but his employer was determined to enforce it.”
Verb
Opposite of to frustrate or prevent (someone) from achieving an aim
“I will do everything I can to assist you in all of your endeavors.”
Verb
Opposite of to have a diminishing effect on
Verb
Opposite of wind back
Verb
Opposite of to reveal the true nature of
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