IPA: //ˌdɪsɪnˈfɛktənt//
KK: /ˌdɪsɪnˈfɛktənt/
A substance that is used to kill germs and bacteria on surfaces or in the air.
The hospital uses a strong disinfectant to keep the environment clean and safe.
A substance used to kill germs and bacteria on surfaces to prevent infection.
The hospital uses a strong disinfectant to clean the operating rooms.
Disinfectant → It is formed from "dis-" (meaning apart) and "infectare" (meaning to infect). The word "disinfectant" refers to a substance that removes or destroys infection, effectively separating or removing the harmful agents.
Think of something that works to 'remove' ('dis-') an 'infection' ('infectare') — that's why disinfectant is used to clean and purify.