おねんね

sleep, nap

→ 御年
noun Rare #44,603
sleep, nap Childish or affectionate baby talk, often used when speaking to a child.
JA: もうおねんねの時間だよ。
EN: It's time to go to sleep.

いいこでおねんねしててね

Be a good little one and go to sleep, okay?

— 千と千尋の神隠し (2001)

おねんねの時間よ。

It’s time to go night-night.

もっとおねんねしなさいな

You should get some more sleep.

— 鏡 (1975)

いいこでおねんねしてたのにね

You were sleeping so peacefully, too.

— 千と千尋の神隠し (2001)