oh-soh-reh
The "o" sound is like the "o" in "open", the "s" is like the "s" in "sun", and the "re" sound is like the "re" in "red".
Here are some other ways to think about the pronunciation:
* Similar to "Oscar" but with a shorter "a" sound.
* Think of "sore" but with an "o" sound at the beginning.
Hope this helps!