Rwa-yoom-oo-nee
Here's a breakdown:
* Rwa: The "R" is a soft, almost guttural sound, similar to the "R" in "rat" but slightly deeper.
* yoom: The "ou" is a diphthong, pronounced like "oo" in "moon."
* oo: This is a short, clear "oo" sound, similar to the "u" in "put."
* nee: The "ni" is pronounced as a simple "nee."
Remember that French pronunciation can be tricky, so it's best to listen to native speakers to get the exact intonation.