IPA: //ˈtʃʌmʃɪp//
KK: /tʃʌmʃɪp/
The condition of being close friends or companions, often sharing living space or experiences together.
Their chumship developed during their years at university, where they shared a dorm room.
Chumship is formed from "chum" (from the late 19th century, meaning a close friend or companion, derived from the British dialect word for a roommate) and "-ship" (meaning the state or condition of). The word "chumship" refers to the state of being close friends or companions.
Think of 'chum' as a close friend and '-ship' indicating a relationship, so 'chumship' means the relationship of being close friends.