This is the 10th most frequent Bulgarian word.
до
The Bulgarian word "до" means "to," "up to," "near," or "next to" in English, depending on the context.
In this sentence, 'до' means 'next to' and indicates proximity or position adjacent to the window.
Седнах до прозореца.
I sat next to the window.
Here, 'до' is used to mean 'until' and refers to a time frame up to a certain point in time.
Магазинът е отворен до осем часа вечерта.
The store is open until eight o'clock in the evening.
In this sentence, 'до' means 'to' and specifies a destination or endpoint of motion, in this case, the river.