This is the 6489th most frequent Russian word.
b
The Russian word "б" (transliterated as "b") is a preposition meaning "in" or "at."
Preposition indicating location during an event.
Мы гуляли в парке.
We walked in the park.
Preposition indicating a specific point in time.
Я вернулся в три часа.
I returned at three o'clock.
Preposition indicating inclusion within an object.