This is the 8979th most frequent Polish word.
soczi
"Soczi" is the Polish name for Sochi, a city in Russia.
Here, 'Soczi' is a noun referring to the geographical location, the city of Sochi.
Soczi to piękne miasto w Rosji.
Sochi is a beautiful city in Russia.
In this sentence, 'Soczi' functions as a noun used in the locative case to indicate the location of an activity.
Zimą w Soczi odbywają się zawody narciarskie.
During winter, skiing competitions take place in Sochi.
Here, 'Soczi' is a noun in the accusative case used to indicate a destination.