IPA: //ˈsɛl.meɪt//
KK: /ˈsɛlˌmeɪt/
A person who shares a room or cell with someone else, particularly in a prison setting.
He was assigned a new cellmate after his previous one was released.
Cellmate → It is formed from "cell" (from Latin *cella*, meaning a small room or chamber) and "mate" (from Old English *gemetta*, meaning a companion or associate). The word "cellmate" refers to a companion or associate who shares a small room, typically in a prison or similar setting.
Think of a 'small room' ('cell') where someone shares space with a 'companion' ('mate') — that's what a cellmate is.