双人房(shuāng rén fáng) - double room in Mandarin

双人房 (shuāngrénfáng) is a double room, the mirror of 单人房 (dānrénfáng, single room). 双 (shuāng) means "pair, double, two together", 人 (rén) is person, and 房 (fáng) is room, so this is a room built for two.

Some 双人房 (shuāngrénfáng) have one large bed and others have two separate beds; the word itself does not specify which, so a booking website often adds detail such as 大床房 (dàchuángfáng, big-bed room) or 双床房 (shuāngchuángfáng, twin-bed room) if it matters.

Like 单人房 (dānrénfáng), this is set phrase hotel vocabulary rather than something you would build fresh in conversation, so it is best learned as a single chunk, ready to use at a check-in desk.