温室
wēn shì · HSK 7
greenhouse
🪴 温室 = 温 warm + 室 room = a warm room = greenhouse
温 means warm (as in 温度, temperature) and 室 means room (as in 教室, classroom). A warm room where plants stay cozy is a greenhouse.
室 — roof 宀 + arrive 至
A semantic compound: 宀 (roof/house) over 至 (to arrive). The image is a place one arrives at and stays in — an inner room. From 'inner chamber' the meaning broadened to 'room' generally, and by extension to specialized rooms like an office or laboratory.