This is the 6090th most frequent Polish word.
amsterdamu
"Amsterdamu" is the genitive or locative case of "Amsterdam" in Polish, meaning "of Amsterdam" or "in Amsterdam," depending on the context.
In this sentence, 'Amsterdamu' is the genitive case of the noun 'Amsterdam', used here to denote possession or characteristic ('beauty of Amsterdam').
Często myślę o pięknie Amsterdamu.
I often think about the beauty of Amsterdam.
Here, 'Amsterdamu' is in the genitive case and is used to indicate origin.
Pochodzę z Amsterdamu.
I come from Amsterdam.
In this context, 'Amsterdamu' is in the genitive case following the preposition 'od', which requires this case to indicate the starting point of the journey.