What's the difference between "ź" and "ż"?
I mean, the pronounce. Is it the same sound and just changes the intensity or what?

Question

Answer

http://en.wikibooks.org/wiki/Polish/Polish_pronunciation
ż 	-	Hard zh. Sounds exactly the same as rz.
Fairly similar to Zhivago, vision, measure, treasure, leisure, and French je suis.

Soft zh. Similar to but clearly softer than ż and rz.

z followed by i is pronounced just like ź.
ziarno, ziemia, gałęzie ("grain", "earth", "branches") are pronounced as "źarno", "źemia", "gałęźe" (not "źiarno", "źiemia", "gałęźie").

Answer

ż - http://pl.forvo.com/word/%C5%BC/#pl (pronounced like rz)
ź - http://pl.forvo.com/word/%C5%BA/#pl (pronounced like zi)

rzeźnik (butcher) - http://pl.forvo.com/word/rze%C5%BAnik/#pl
żubr (bison) - http://pl.forvo.com/search/%C5%BCubr/pl/
źrebie (foal) - http://pl.forvo.com/search/%C5%BArebi%C4%99/

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