This is the 128th most frequent Bulgarian word.
борисов
"Борисов" is a Bulgarian surname, commonly associated with individuals named Boris or as a patronymic meaning "son of Boris."
Here, 'Борисов' is used as a family name to refer collectively to a family unit.
Семейство Борисов работи усилено в градината си през почивните дни.
The Borisov family worked hard in their garden during the weekends.
In this case, 'Борисовите' is an adjective derived from the proper name 'Борисов', indicating possession or association with someone named Borissov.
Борисовите правила в училище са строги, но справедливи.
The Borisov's rules at school are strict but fair.
In this context, 'Борисов' is a proper noun, specifically a surname used to identify a specific person, likely a political figure.