put your finger on

US /pʊt jʊər ˈfɪŋ.ɡər ɑːn/
UK /pʊt jʊər ˈfɪŋ.ɡər ɑːn/
"put your finger on" picture
1.

metterci il dito sopra, identificare con precisione

to identify exactly what is wrong or what has caused a problem

:
I know something is wrong, but I can't quite put my finger on it.
So che c'è qualcosa che non va, ma non riesco a metterci il dito sopra.
The manager couldn't put his finger on why sales were declining.
Il direttore non riusciva a capire perché le vendite stessero diminuendo.