Translation of furtivo in Spanish-English

I remember that after highschool I went to study English in New York. First I did not know whether the city was right for me cause I wanted a place where I would not feel lost. However, it was the right choice.
Now I'm drinking a beer with a colleague. We will shoot a film about the bar scene and the situation of young people here in Ibiza. There are also other aspects to live here, besides tourism.
I teach at the university of natural sciences. I have studied at the ETH in Zurich. At that time I started learning Spanish and I found Vocabulix. Since then I'm using it regularly with joy.