vitiate
🇺🇸
/ˈvɪʃieɪt/
🇬🇧
/ˈvɪʃieɪt/
to make something less effective or spoil it
Smoking vitiates the air in the room, making it unpleasant to breathe.
喫煙は部屋の空気を悪化させ、呼吸が不快になります。