This is the 6904th most frequent Korean word.
자를
"자를" means "ruler" or "measuring tool" in English.
Here, '자를' functions as a modifier describing the scissors ('가위') that are used to cut ('자르다') the paper ('종이').
나는 종이를 자를 가위를 가지고 있어요.
I have scissors to cut paper.
In this sentence, '자를' is part of the construction indicating the time ('시간', implied) when the meeting will take place.
그는 오늘 의사를 만날 자를 알아봤나요?
Did he find out the time to meet the doctor today?
Here, '자를' is involved in expressing the condition or criterion ('상황', implied) for the project's success.