Overnight Stay
Sleepover
noun
You know that 泊まる is "to stay the night." The noun version is a overnight stay or sleepover.
The reading comes from 泊まる, so pull from that and you shall know this.
うちの子、幼稚園のお泊まり会をすごく楽しみにしてたんだけど、風邪を引いちゃって、今抗生物質を飲ませたところなんです。だから、残念ながら今夜は欠席させて頂きます。
My kid was really looking forward to the kindergarten sleepover, but he got a cold and I just made him take antibiotics. So, sadly, he'll be absent tonight.
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.