vitiate
🇺🇸
/ˈvɪʃieɪt/
🇬🇧
/ˈvɪʃieɪt/
to make something less effective or spoil it
Smoking vitiates the air in the room, making it unpleasant to breathe.
吸烟恶化了房间里的空气,使呼吸变得令人不快。