to put one's finger on something
01
to figure out why things are the way they are and be able to identify the reason
Idiom
Informal
예시들
She could n't quite explain what was wrong with the painting, but she could put her finger on the issue after a closer look.
The detective had a hunch about the case, but he could n't put his finger on the key evidence until he reexamined the crime scene.
