This is the 513th most frequent Bulgarian word.
дупница
"Дупница" is the name of a town in southwestern Bulgaria.
In this sentence, 'Дупница' is used as a proper noun representing the name of a town in Bulgaria.
Посетих град Дупница миналото лято.
I visited the town of Dupnitsa last summer.
Here, 'дупница' is used to figuratively describe a small hole or an imperfection in an object.
Имаше дупница в капана на мишките.
There was a small hole in the mouse trap.
In this sentence, 'дупница' refers to a small container or vessel used for a practical purpose.