완결이 · 완결을
completion, finale (of a series)
Example
제가 보던 웹툰이 드디어 완결됐어요.
The webtoon I was reading has finally ended.
Word parts
완 complete+결 tie, conclude
Literally 'complete and tie up'.
Good to know
완결되다 or 완결이 나다 = (a series) ends; 완결작 = a finished series, perfect for reading in one go.
Related words