pin down
US /pɪn daʊn/
UK /pɪn daʊn/

1.
menentukan, memastikan
to understand or describe something exactly
:
•
It's hard to pin down the exact cause of the problem.
Sulit untuk menentukan penyebab pasti masalahnya.
•
I can't quite pin down what's bothering me.
Aku tidak bisa menentukan apa yang menggangguku.
2.
menahan, membuat tidak bergerak
to make someone stay in a particular place or prevent them from moving
:
•
The police managed to pin down the suspect in the alley.
Polisi berhasil menahan tersangka di gang.
•
The heavy rain pinned us down in the cabin for hours.
Hujan deras menahan kami di kabin selama berjam-jam.