This is the 1408th most frequent Polish word.
uczelni
The Polish word "uczelni" means "of the university" or "of the college" (genitive or dative form of "uczelnia").
Here, 'uczelni' is in the genitive case, indicating the origin or source, i.e., coming from the university.
Student wrócił z uczelni po zajęciach.
The student returned from the university after classes.
In this sentence, 'uczelni' is in the locative case, referring to the location of the event, i.e., at the university.
Zostałem zaproszony na konferencję odbywającą się w mojej uczelni.
I was invited to a conference taking place at my university.
Here, 'uczelni' is in the genitive case, showing possession or association, i.e., belonging to the university.