1580s, "one allowed to live in a house rented by another" (usually for a consideration), from in "inside" + mate "companion." Sense of "one confined to an institution" is first attested 1834.
例文
1. He learned this song asan inmate at a Texas prison.
彼はテキサス刑務所で服役していた時にこの歌を覚えた。
2.The inmate outwitted his guards and escaped.
囚人は警備員をだまして逃げた。
3.I think you 'll make a nice addition to the inmate community.
あなたはこの犯人社会の良い加入者だと思います。
4.A young,tough-looking inmate ,Tweener,steps of the bus.
若い、粗野そうな犯人Tweenerがバスから出てきた。
5.The average inmate ,however,leaves prison in about two years.