This is the 868th most frequent Polish word.
żony
"Żony" means "wives" in English.
The word 'żony' here is the plural form of 'wife', in the genitive case, showing possession ('of my friend').
Spotkałem żony mojego przyjaciela.
I met my friend's wives.
The word 'żon' (genitive, plural of 'żona') expresses 'of wives', implying possession or association in the phrase 'one of the wives'.
To jedna z żon w tej książce historycznej.
This is one of the wives in this historical book.
The word 'żony' here is the singular genitive case of 'żona', showing that the 'comment' is of the 'wife'.