invalidate

verbs

declare invalid

"The contract was annulled"; "void a plea"

annul, avoid, invalidate, nullify, quash, void

is derived from

is derived from

antonym

make invalid for use

"cancel cheques or tickets"

cancel, invalidate

show to be invalid

invalidate, nullify

antonym

take away the legal force of or render ineffective

"invalidate a contract"

invalidate, vitiate, void

is derived from

antonym