This is the 11635th most frequent Polish word.
klifu
The Polish word "klifu" means "cliff" in English.
Here, 'klifie' (the locative case of 'klif') is used to describe the location where the action is taking place.
Spacerowaliśmy po klifie, podziwiając widoki na ocean.
We walked along the cliff, admiring the views of the ocean.
In this sentence, 'klifem' (the instrumental case of 'klif') indicates a positional relationship, specifying something below it.
Pod klifem znajdowały się piękne plaże.
Under the cliff, there were beautiful beaches.
Here, 'klifu' (the genitive case of 'klif') is used to show possession or relation, referring to the shape belonging to the cliff.