This is the 914th most frequent Polish word.
koalicji
"Koalicji" means "of the coalition" in English.
Here, 'koalicję' is in the accusative form, indicating the object of creation (what was formed).
Partie polityczne utworzyły koalicję, aby wspólnie rządzić krajem.
The political parties formed a coalition to jointly govern the country.
Here, 'koalicji' is in the genitive form, indicating possession or association (future of).
Podczas wyborów omawiano przyszłość koalicji.
During the elections, the future of the coalition was discussed.
Here, 'koalicji' is in the dative form, showing the indirect object or reason (thanks to whom/what).