Questions & Answers about El pomo de la puerta está suelto.
Spanish usually links two nouns with de where English often puts one noun in front of another.
So:
- the door knob → el pomo de la puerta
- literally: the knob of the door
This is very common in Spanish:
- the car door → la puerta del coche
- the kitchen table → la mesa de la cocina
So de la puerta is the normal Spanish way to express door as a modifier.