Question on Polish

From: Andrew Jarrette
Message: 44770
Date: 2006-05-30

Just as a by-the-way sideline to all the discussion about trzymac', I would like to ask any Pole on cybalist (presumably Piotr), what is the actual pronunciation of y in Polish?  The reason I ask this is because many Polish-English dictionaries, at least those published by English publishers, assert that Polish y is pronounced /I/ and is the same as English /I/ as in bit.  Is that true?  Or is it more like the Russian y, an unrounded high back or central vowel (I presume, based on what I've read, not what I've heard)?  I hate it when poor-quality but readily-available language reference books oversimplify or misrepresent foreign pronunciation (or foreign grammar, for that matter).  Also, why does trzymac' have y and not i?  Is this a development after rz?
 
Andrew