Here's the breakdown:
* Pra - Pronounced like "pra" in "practice"
* wdz - Pronounced like "vts" in "vits" (the "dz" makes a sound similar to a "ts" but with a slight "j" after it)
* ik - Pronounced like "ick" in "quick"
Therefore, the pronunciation of "Prawdzik" is "pra-vts-ick".
It might take some practice to get it right, but with a little effort, you'll be able to pronounce it correctly.