contaminate
US /kənˈtæm.ə.neɪt/
UK /kənˈtæm.ə.neɪt/

1.
污染, 弄髒
make (something) impure or unsuitable by mixing or touching with something unclean or harmful
:
•
The spill could contaminate the entire water supply.
洩漏可能會污染整個供水系統。
•
Be careful not to contaminate the sample with your bare hands.
小心不要用裸手污染樣品。