This is the 3691st most frequent Polish word.
kielcach
"Kielcach" means "in Kielce," referring to the city of Kielce in Poland.
In this sentence, 'Kielcach' refers to the locative case of the name of the city 'Kielce', used to indicate the location where the action is taking place.
Mieszkam teraz w Kielcach.
I live in Kielce now.
Here, 'Kielcach' is again in the locative case, used after the preposition 'w' (in) to indicate location.
Będziemy w Kielcach w przyszłym tygodniu.
We will be in Kielce next week.
Once more, 'Kielcach' in the locative case demonstrates the location where the meeting occurred.