A Request, Request, Wish, Please
noun, verbal noun
The noun form of request (don't be tricked by the い on the end, it's not an adjective). So, request goes to a request.
おねがい
The reading is the same like お願いします. Hopefully you're able to read that by now so you're able to read this too.
お願い!手伝って!
Please! Help me!
ちょっとお願いがあるんだけど、聞いてもらえる?
I have a favor to ask you, would you hear me out?
お願いだから、その話はもうやめて。
Please, let's stop talking about that.