noun
slatted shutter; louver door; louver window
A door or window with horizontal slats for ventilation and light control, often used in tropical or traditional settings.
暑いので鎧戸を閉めて風を通した。
It was hot, so I closed the louver door to let the breeze through.
この家の窓には鎧戸が付いている。
The windows of this house have slatted shutters.
Compound of 鎧 (yoroi, 'armor') and 戸 (to, 'door'), referring to the armor-like slatted construction.