One entry found for vitiate.

Main Entry: vi·ti·ate
Pronunciation: vish--t
Function: verb
Inflected Form(s): -at·ed; -at·ing
1 : to harm the quality of : SPOIL <grammatical errors vitiated the impact of her writing>
2 : to destroy the effect or force of <fraud vitiates a contract>
- vi·ti·a·tion /vish---shn/ noun