This is the 2019th most frequent Spanish word.
kursk
"Kursk" is not a Spanish word; it is the name of a Russian city.
Kursk is used as a proper noun referring to a historical event.
La Batalla de Kursk fue una de las más importantes de la Segunda Guerra Mundial.
The Battle of Kursk was one of the most important of World War II.
Kursk is used as a proper noun naming a geographical location.
El tren con destino a Kursk saldrá a las ocho de la mañana.
The train to Kursk will depart at eight o'clock in the morning.
Kursk is used in the context of being the name of a city.