IPA: //ˈbʌŋkˌmeɪt//
KK: /bʌŋkˌmeɪt/
A person who shares a bed or sleeping space with someone else, often in a dormitory or shared living situation.
My bunkmate and I became good friends during our time at camp.
Bunkmate → The word is formed from 'bunk' (from the Dutch 'bunk', meaning a bed or sleeping place) and 'mate' (from Old English 'gemetta', meaning companion or friend). A bunkmate is a companion who shares a sleeping space, typically in a dormitory or similar setting.
Think of sharing a 'bed' ('bunk') with a 'friend' ('mate') — that's what a bunkmate is.