“合住”的英语可以翻译为：chummage ...

你若同意合住双人房间就可以省下单间附加费了。You can avoid the single supplement by agreeing to share a twin room.他带我看了他和埃丝特合住的公寓。He showed me the flat he shares with Esther.他和我合住这间宫殿一般的房间.He shares this palatial apartment with me....