This is the 6097th most frequent Polish word.
andrzejczaku
"Andrzejczaku" is not a standalone word in Polish but rather a form of the surname "Andrzejczak," likely in the vocative or possessive case.
used as a proper noun referring to a person, Andrzejczak.
Widziałem Andrzejczaku na spacerze w parku.
I saw Andrzejczak during a walk in the park.
used as a nominative case of a surname, indicating possession.
Szukam Andrzejczaku, bo zgubił swoje klucze.
I am looking for Andrzejczak because he lost his keys.
used as a proper noun in a conversation context, referring to the individual named Andrzejczak.