This is the 7740th most frequent Polish word.
malinowskiego
"Malinowskiego" is the genitive or accusative singular form of "Malinowski," a Polish surname, meaning "of Malinowski" or referring to someone named Malinowski.
The word 'malinowskiego' is used here to indicate possession, showing that the house belongs to Malinowski.
Widziałem dom Malinowskiego na wzgórzu.
I saw Malinowski's house on the hill.
Here, 'malinowskiego' signifies the author of the book, indicating ownership or authorship.
Książka Malinowskiego była bardzo interesująca.
Malinowski's book was very interesting.
In this sentence, 'malinowskiego' is in the genitive case, being used in a context of giving or transferring something to Malinowski.