This is the 1694th most frequent Russian word.
берегов
"Берегов" means "of the shores" or "of the banks" (genitive plural form of "берег").
Here, 'берегов' (of shores) is in the genitive case, indicating possession or association with the river's banks.
Рыбаки вернулись с берегов реки с полным уловом.
The fishermen returned from the riverbanks with a full catch.
In this sentence, 'берегов' specifies the location or physical features around the lake, again using the genitive case.
Путешественники любовались красотой берегов озера на рассвете.
The travelers admired the beauty of the lake's shores at dawn.
The word 'берегов' denotes the unseen edges or boundaries of the sea owing to the fog.