This is the 9313th most frequent Korean word.
것이지
"것이지" is a colloquial contraction meaning "it is that" or "it is the thing that."
The word '것이지' in this sentence emphasizes the satisfaction or confirmation about the object of search.
그게 바로 우리가 찾던 것이지.
That's exactly what we were looking for.
Here, '것이지' refers to the subject matter that is planned for study.
이게 내일부터 공부할 것이지.
This is what we will study from tomorrow.
In this sentence, '것이지' indicates clarity or singleness of a matter being discussed.