IPA: /ˈɪntərˌkɒm/
KK: /ˈɪntərˌkɑm/
A device that allows people in different rooms or areas to communicate with each other using microphones and speakers.
We installed an intercom system so that we can talk to each other without leaving our rooms.
Intercom → It is formed from "inter-" (meaning between) and "com" (from "communicare", meaning to communicate). The word describes a device that allows communication between different rooms or areas, facilitating conversation across distances.
Think of communicating 'between' ('inter-') different places — that's what an intercom does.
No commonly confused words.