ˈʒɛʒnik
Here's a breakdown of the pronunciation:
* "rz" is pronounced like a "zh" sound (like in the English word "pleasure").
* "e" is pronounced like the "e" in "bed".
* "ź" is pronounced like the "zh" sound (like in the English word "treasure").
* "nik" is pronounced like the "nik" in "nick".
Therefore, "rzeźnik" is pronounced with a soft "zh" sound at the beginning and middle, and a "nik" sound at the end.