Translation of entristecer

The entrance hall had a design of the seventies which I found charming. An older man came towards me an asked me whether I needed a ride. I agreed and we drove to downtown of Havana, capital of Cuba.
The belief of somebody that a race or a group of people to which he belongs is superior to another. Even though the word itself stems from the word 'race', its meaning must be generalized.
We left and went back to the boat which took us back to the big vessel. We started our journey back to the main land. It was already late and from the main land, it was still a four hour drive back.