This is the 3839th most frequent Polish word.
peru
"Peru" in Polish means "feather" or refers to the South American country Peru, depending on context.
Here, 'Peru' is a proper noun referring to the country in South America.
Odwiedziłem kiedyś Peru i zobaczyłem Machu Picchu.
I visited Peru once and saw Machu Picchu.
The word 'perły' phonetically resembles 'Peru' in Polish but means 'pearls'. It's used metaphorically here.
Mój znajomy wylewał perły w pracy po godzinach.
My friend shed 'pearls' working overtime.
Again, 'Peru' is used as a proper noun referring to the country.