IPA: /ɪnˈfɛktər/
KK: /ɪnˈfɛktər/
A person or thing that causes an infection in others.
The infector spread the virus to many people in the community.
Infector → It is formed from "in-" (meaning into) and "facere" (meaning to make or do). The word "infector" refers to someone or something that makes or causes infection, introducing harmful agents into a host.
Think of something that 'makes' ('facere') an infection 'into' ('in-') a body — that's why an infector is something that causes infection.