'套间' (tào jiān) literally combines '套' (tào), meaning 'set' or 'suite', and '间' (jiān), a measure word for rooms—here functioning as a noun meaning 'room' or 'chamber'. Together, they form a compound noun referring to a group of interconnected rooms designed as a single functional unit, most commonly in hotels, offices, or residential buildings. Unlike a standard room, a 套间 typically includes at least a bedroom and a separate living area—and often a private bathroom and sometimes a small kitchenette.

This term emphasizes spatial integration and elevated status or comfort; it's frequently used in hospitality contexts (e.g., '豪华套间' — deluxe suite) and real estate listings. While '间' alone means 'room', in '套间' it loses its standalone count-noun function and becomes part of a fixed lexical unit. The word carries a neutral-to-formal register and is rarely used in casual speech about ordinary bedrooms.