This is the 9089th most frequent Polish word.
studzienicach
"Studzienicach" is the locative case of "Studzienice," a place name in Poland. It means "in Studzienice."
Here, 'Studzienicach' is the locative case of 'Studzienice', indicating a location where the grandparents live.
W Studzienicach mieszkają moi dziadkowie.
My grandparents live in Studzienice.
In this sentence, 'Studzienicach' is incorrectly used in the dative form instead of the locative case required after 'do' ('do Studzienic').
Jedziemy na wycieczkę do Studzienicach.
We are going on a trip to Studzienice.
The word 'Studzienicach' in this sentence is in the locative case, correctly used to denote a state or condition at a specific location.