vitiate
🇺🇸
/ˈvɪʃieɪt/
🇬🇧
/ˈvɪʃieɪt/
to make something less effective or spoil it
Smoking vitiates the air in the room, making it unpleasant to breathe.
吸煙惡化了房間裡的空氣,使呼吸變得令人不快。