This is the 1394th most frequent Korean word.
얘기다
"얘기다" is not a standard Korean word. Did you mean "얘기"? It means "talk" or "story."
In this sentence, '얘기다' is used to identify what the subject is—a story. It marks the statement as a descriptive assertion about the topic presented.
이건 정말 흥미로운 얘기다.
This is truly an interesting story.
Here, '얘기다' refers to the concept of telling or narrating a story concerning the subject matter, linked to recounting past events.
그는 지난 여행에 관해 얘기다.
He tells a story about his last trip.
In this case, '얘기다' describes the act of conversing or discussing in general, emphasizing how engaging in communication can impact emotional well-being.