Etymology
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invalidate (v.)

"destroy the strength or validity of, render of no force or effect," 1640s, from invalid (adj.2) + -ate (2). Related: Invalidated; invalidating.

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Definitions of invalidate

invalidate (v.)
declare invalid;
Synonyms: annul / quash / void / avoid / nullify
invalidate (v.)
make invalid for use;
Synonyms: cancel
invalidate (v.)
show to be invalid;
Synonyms: nullify
invalidate (v.)
take away the legal force of or render ineffective;
invalidate a contract
Synonyms: void / vitiate
From wordnet.princeton.edu