This is the 10194th most frequent Polish word.
brzegach
"Brzegach" means "edges" or "banks" (typically of a river or shore) in English.
The word 'brzegach' refers to the banks or edges of the lake in the locative plural form, indicating location.
Na brzegach jeziora rosną wysokie drzewa.
High trees grow at the shores of the lake.
Here 'brzegach' denotes the location at the edges of the river, specifying a plural form used with prepositions.
Spotkaliśmy spacerowiczów na brzegach rzeki.
We met pedestrians at the river banks.
In this sentence, 'brzegach' refers to the physical edges of the paper in the same grammatical locative plural form.