This is the 8845th most frequent Polish word.
sachalin
"Sachalin" in Polish refers to "Sakhalin," an island in the North Pacific, part of Russia.
Here, 'Sachalin' is a proper noun referring to a geographical location.
Sachalin to wyspa na wschodnim wybrzeżu Rosji.
Sakhalin is an island off the eastern coast of Russia.
In this sentence, 'Sachalin' is used to denote the area being studied, related to its natural aspects.
Mój kolega interesuje się fauną i florą Sachalina.
My friend is interested in the fauna and flora of Sakhalin.
Here, 'Sachalin' indicates the location of an event.