This is the 4095th most frequent Spanish word.
exterior
Outer; external; outside.
Here, 'exterior' is used as a noun to mean 'outside' or 'the outer part'.
El coche está en el exterior de la casa.
The car is outside the house.
In this sentence, 'exterior' acts as an adjective, describing 'paint' as belonging to the outer part.
La pintura exterior de la casa está desgastada.
The exterior paint of the house is worn out.
Here, 'exterior' as a noun is used to denote the view or aspect from outside.