This is the 13429th most frequent Polish word.
panującej
"Ruling" or "prevailing."
In this sentence, "panującej" is used as an adjective derived from the verb "panować," describing the existing or pervasive state of silence.
Atmosfera w klasie była bardzo spokojna, co motywowało uczniów do nauki w panującej ciszy.
The atmosphere in the classroom was quite calm, which motivated students to learn in the prevailing silence.
Here, "panującej" qualifies "epidemii" describing it as ongoing or currently prevailing.
W wyniku panującej epidemii wiele szkół musiało przejść na nauczanie zdalne.
As a result of the ongoing epidemic, many schools had to shift to remote teaching.
The word "panującej" acts as an adjective specifying the prevailing or predominant nature of the government's policies in the context.