Translation of tougher in Spanish

Boston is kind of huge neighborhood, generally very friendly people and you may meet many people that you already know. So it is pretty easy to get used to and if you grow up there, you don't wanna leave. If you do, you are going to miss it terribly.
If I look at dictionaries they do not give long sentences, only specific words and their meaning when they are used in a compounded form, which by the way can mean something totally different than when used by themselves.
This is a fantastic idea, I am learning German just since last year. I speak, write and read well, and I will improve soon. This site, Vocabulix, I'm visiting often and I am mostly online.