KanjiJLPT N4
Room

room, apartment, chamber, greenhouse, cellar

Mnemonic

At the peak of the tallest mountain, someone has built a roof—creating a grand room. This isn't just any room: it's a formal summit chamber carved into the rock. Only those brave enough to reach the peak earn a seat beneath the roof.
Additional thoughts
Picture a stone chamber at a mountaintop with a solid roof overhead. The peak gives the location; the roof encloses the space, turning open air into a designated room.
Quick recall
A roof built over a peak creates a secret summit room.

Details

The keyword for 室 is room. This kanji refers to an enclosed space within a building, such as a chamber or a room used for a specific purpose. It carries the sense of an interior space that is sheltered and contained, often implying a more formal or designated area compared to a casual living space. It is commonly used to denote offices, laboratories, and other functional rooms.
On'yomi
しつ
Kun'yomi
むろ