This is the 9054th most frequent Polish word.
starych
The Polish word "starych" means "old" in the genitive or locative plural form.
The word 'starych' here is a plural masculine form in the accusative case, describing 'old friends'.
Widziałem starych znajomych na ulicy.
I saw old friends on the street.
The word 'starych' is a plural masculine form in the genitive case, referring to 'old cars'.
Naprawiam starych samochodów w warsztacie.
I repair old cars in the workshop.
The word 'starych' functions as a plural masculine adjective in the genitive case, modifying 'papers'.