This is the 375th most frequent Indonesian word.
pintu
Door.
Here, 'pintu' refers to a literal door of a room.
Saya membuka pintu kamar.
I open the room door.
In this case, 'pintu' is used metaphorically to mean a gateway or opportunity.
Kesempatan ini adalah pintu menuju kesuksesan.
This opportunity is the door to success.
Here, 'pintu' again refers to a physical door, specifically of a shop.