soh-mat-oh-grav-ik
Here's a breakdown:
* soh: Like the word "so"
* mat: Like the word "mat"
* oh: Like the word "oh"
* grav: Like the word "grave"
* ik: Like the "ick" in "sick"
It's important to note that the "g" in "gravic" is soft, like the "g" in "gem."