Translation of defensive in Spanish

I want to improve my level of English. Have you ever been in the U.S. and in which states have you been? I've been in England, Scotland and Ireland, but unfortunately, I have never been to America.
Anyway, there are a lot of people on board and I no matter how high the waves may be, I always suffer from nausea or seasickness. I have not been on a small boat before. I will have to vomit.
To answer your question I'm a college teacher but I am working now for a real estate agency. I'm also responsible for the finances. It's a very lucrative business but I hate it, most of the time.