IPA: /ˈhaʊsˌmeɪt/
KK: /ˈhaʊsˌmeɪt/
A person who lives in the same house as someone else, sharing the living space and responsibilities.
I have a housemate who helps with the rent and chores.
Housemate is formed from "house" (from Old English *hus*, meaning a dwelling or shelter) and "mate" (from Old English *gemetta*, meaning a companion or associate). The word "housemate" refers to a person who shares a house with others, indicating companionship in a shared dwelling.
Think of a 'house' as a place where people live together, and 'mate' as a companion. A housemate is simply someone who shares that living space with you.