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

1.
يضع إصبعه على, يحدد بالضبط
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.
أعلم أن هناك شيئًا خاطئًا، لكن لا أستطيع أن أضع إصبعي عليه تمامًا.
•
The manager couldn't put his finger on why sales were declining.
لم يستطع المدير تحديد سبب انخفاض المبيعات.