This is the 481st most frequent Bulgarian word.
бта
It seems like "бта" might be a typo or not a standard Bulgarian word. Can you clarify or provide more context?
Here, "бта" is used as an adjective describing the noun "книга" (book), providing information about its characteristic or quality (being old).
Тази бта книга е много интересна.
This old book is very interesting.
In this sentence, "бта" is a noun referring to a "beam," particularly of light or another medium.
Бта за светлина изпълни стаята.
A beam of light filled the room.
Here, "бта" functions as a verb related to overcoming or defeating someone or something.