Long Time
If you use a slide to enter a building, you'll be sliding for a long time.
きゅう, く
ひさ
None
You slide for such a long time that you get hungry. Luckily, once in a while a cucumber (きゅう) comes tumbling down the slide next to you.
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.