ruh-zhoo-ee
Here's a breakdown of the sounds:
* ruh: Like the "r" in "run" but with a slight French "r" sound (a bit like the "r" in "car" but shorter and more guttural)
* zhoo: Like the "zoo" in "zoo"
* ee: Like the "ee" in "see"
Important Note: "Rejouis" is the plural form of "rejoui." The singular form is "rejoui" and is pronounced ruh-zhoo-ee as well.