This is the 17478th most frequent Korean word.
성공이다
"It is a success."
The word '성공이다' is used here to state a successful achievement regarding a specific project.
그 프로젝트는 결국 성공이다.
That project is ultimately a success.
Here, '성공이다' expresses a hopeful sentiment towards achieving success in a future event.
다음 시험은 꼭 성공이다.
The next examination must be a success.
In this example, '성공이다' conveys an evaluative opinion about the outcome of the business endeavor.