This is the 3798th most frequent Russian word.
ai
The Russian word "ай" is an interjection expressing surprise, pain, or exclamation, similar to "oh" or "ouch" in English.
Used to express regret or realization of a mistake.
Ай, что же я наделал?
Oh, what have I done?
Used to convey admiration or emotional response to something perceived as wonderful.
Ай, как красиво здесь!
Wow, it is so beautiful here!
Used as an exclamation expressing pain or surprise.