This is the 310th most frequent Finnish word.
turkki
"Turkki" in Finnish means "fur" (animal coat) or "coat" (clothing).
In this sentence, 'turkin' refers to the natural fur or coat that animals, like dogs, have.
Talvella koira tarvitsee lämpimän turkin.
In winter, the dog needs a warm coat.
Here, 'Turkkiin' is used as the name of the country Turkey, indicating a destination.
Matkustin Turkkiin lomalle viime kesänä.
I traveled to Turkey for a holiday last summer.
In this context, 'turkin' refers to a piece of clothing, namely a coat, typically worn by humans.