This is the 17628th most frequent Polish word.
zgromadzeniu
"Zgromadzeniu" means "assembly" or "gathering" in English.
Here 'zgromadzeniu' is used as a locative form, referring to the event or gathering itself where attendance occurs.
W zgromadzeniu uczestniczyło ponad sto osób.
Over a hundred people participated in the assembly.
In this case, 'zgromadzeniu' is in the dative case, indicating that respect is being given towards the assembly.
Zgromadzeniu należy się szczególny szacunek.
The assembly deserves special respect.
Here, 'zgromadzeniu' appears in the dative case after a preposition, showing the relation of preparation towards the assembly.