This is the 4198th most frequent Korean word.
중단했다
"중단했다" means "stopped" or "halted."
중단되었다 (passive form) shows that the project itself has been halted externally.
이 프로젝트는 중단되었다.
This project was interrupted.
중단했다 highlights the temporary cessation of an action, emphasizing 'work' in this case.
그는 일을 중단했다.
He paused his work.
중단했다 is used here to indicate that the speaker has ceased their plans.