noun
louver; louvre
Refers to a set of angled slats or blades used for ventilation or light control, commonly found in windows, doors, or mechanical equipment.
この窓にはルーバーが付いていて、風通しがいい。
This window has louvers, so it's well ventilated.
エアコンの室外機のルーバーを掃除した。
I cleaned the louvers on the outdoor unit of the air conditioner.