bedroom; sleeping room
A straightforward term for a room used for sleeping. Less common than 寝室 (しんしつ) in modern Japanese, but still understood.
この家には寝部屋が三つある。
This house has three bedrooms.
寝部屋の窓から朝日が差し込んだ。
The morning sun streamed in through the bedroom window.
Compound of 寝 (ね, 'sleep') and 部屋 (へや, 'room'). The reading ねべや is a straightforward combination of the kun'yomi readings of the two kanji.