vitiate
C2CEFR level
85/100Rarity: very rare
FormalRegister
General verb
To spoil or weaken the effectiveness or validity of something.
Selection bias vitiates any inference drawn from the sample.
Law verb
To impair or destroy the legal validity of a contract or of consent to it.
A fundamental mistake as to the subject matter may vitiate the entire agreement.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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