The Vietnamese word "ngợ" is an adjective that expresses a sense of uncertainty or doubt. It can be used when someone is not quite sure about something or has lingering doubts in their mind.
The phrase "ngờ ngợ" is a variation of "ngợ." It carries a similar meaning but emphasizes a slightly stronger sense of doubt or vagueness.
Example: "Tôi ngờ ngợ về việc đó, nhưng không nhớ rõ."
In summary, "ngợ" is a useful word for expressing doubt or uncertainty in Vietnamese.