If I could understand what the ^&** you were sayi-ASSUMING DIRECT CONTROL.
"dziewczyna"
I you wanna say it pleasantly you should say :Piękna dziewczyna or śliczna dziewczyna You can say 'laska' BUT it's not always perceived positively, it's rather used in teenage slang and some girls...
"Śliczna dziewczyna"
the word for water in Polish is "woda" pronounced vo-da.