This is the 7194th most frequent Swedish word.
rödin
"Röding" (correct spelling) is Swedish for "Arctic char," a type of freshwater fish.
Here, 'rödin' is being used as a noun referring to a type of freshwater fish, specifically the Arctic char.
Rödin simmar snabbt i den kalla floden.
The char swims quickly in the cold river.
In this sentence, 'rödin' remains a noun and is the object of the sentence, specifying the fish caught.
Fiskaren fångade en stor rödin under fisketuren.
The fisherman caught a big char during the fishing trip.
Similarly, 'rödin' denotes the specific type of fish being referred to, within a context of culinary preparation.