noun
sleep; sleepiness; beddy-bye
Childish or affectionate word for sleep or feeling sleepy, used mainly with small children.
もうおねむの時間だよ。
It's time for beddy-bye now.
赤ちゃんがおねむでぐずっている。
The baby is fussy because she's sleepy.
From the honorific prefix お (o-) attached to ねむ (nemu), a baby-talk or childish form related to 眠る (nemuru, 'to sleep') and 眠い (nemui, 'sleepy').