/tə ˈvɪʃieɪt ə kleɪm/ – Phrase
Definition: làm mất hiệu lực một yêu sách.
A more throughout explanation: To vitiate a claim means to render it invalid or void, typically due to a defect or flaw that undermines its legitimacy or legal standing.
Example: The plaintiff’s failure to disclose material information during the discovery process was found to vitiate their claim for damages.