put your finger on something
idiomPart offinger
put your finger on something — idiom
1. To be able to identify or name exactly what the problem or the cause of a situat
1.idiom
Definition
To be able to identify or name exactly what the problem or the cause of a situation is.
Example
There is something strange about this room, but I cannot put my finger on what it is.
The technician finally put her finger on the reason the computer kept shutting down.