What does the law is hard, but its the law mean in latin

Unfortunately, this is something i can't you with, because i am not you. but i can tell you what to do.so think about times when you met with people with a different ethnic group as you and describe how they acted and also describe time when you may have showed your own feelings and they way you see things about life.    i hope i you somewhat,

In english this question is what are all the roots with alternative vowels with this root.