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invalidate    音标拼音: [ɪnv'ælɪd,et]
vt. 使无效

使无效

invalidate
v 1: declare invalid; "The contract was annulled"; "void a plea"
[synonym: {invalidate}, {annul}, {quash}, {void}, {avoid},
{nullify}] [ant: {formalise}, {formalize}, {validate}]
2: make invalid for use; "cancel cheques or tickets" [synonym:
{cancel}, {invalidate}]
3: show to be invalid [synonym: {invalidate}, {nullify}] [ant:
{validate}]
4: take away the legal force of or render ineffective;
"invalidate a contract" [synonym: {invalidate}, {void},
{vitiate}] [ant: {validate}]

Invalidate \In*val"i*date\, v. t. [imp. & p. p. {Invalidated};
p. pr. & vb. n. {Invalidating}.] [From {Invalid} null.]
To render invalid; to weaken or lessen the force of; to
destroy the authority of; to render of no force or effect; to
overthrow; as, to invalidate an agreement or argument.
[1913 Webster]


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