Simple:
* The climbers rappelled down the cliff face.
* After reaching the summit, we rappelled back down.
Descriptive:
* The experienced mountaineer rappelled with precision and grace, expertly controlling the rope.
* We rappelled down the sheer rock face, the wind whipping at our faces.
Figurative:
* The stock market rappelled down after the news of the economic downturn.
* After the disastrous performance, her confidence rappelled down like a deflated balloon.
In a question:
* Do you know how to rappel?
* Have you ever rappelled before?
Remember, "rappel" can be used as a noun (the act of rappelling) or a verb (to rappel).