This is the 4166th most frequent Chinese word.
哦
"哦" is an interjection used to express realization, acknowledgment, or surprise, similar to "oh" in English.
Exclamation: Used to express surprise or realization.
哦！那里有一只兔子！
Oh! There's a rabbit over there!
Ending particle: Used to seek confirmation or imply doubt.
你说这是你的哦？
Are you saying this is yours?
Ending particle: Used to emphasize or draw attention to the statement.