洁净 (jié jìng): ทําความสะอาด

The nurse uses disinfectant every day to scrub the floor and instruments of the operating room until they are spotless, ensuring patients won't get infected by bacteria.

This restaurant's kitchen is kept extremely clean; the chefs even require all staff to wash their hands once every hour.

After the rain, the sky became exceptionally clear and clean; you could even see the trees on the distant mountain top clearly.

She wipes the glass windows at home until they are spotless every day; the neighbors all praise that her house is always so clean and bright.