| 单词 | invalidate |
| 释义 | invalidate —invalidation, n. —invalidator, n. /in val"i dayt'/, v.t., invalidated, invalidating. 1. to render invalid; discredit. 2. to deprive of legal force or efficacy; nullify. [1640-50; INVALID2 + -ATE1] Syn. 1. weaken, impair; disprove, refute, rebut. |
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