Etymology for Defen

I couldn't think of a new word as you'd requested, but this is my coolest new Latin discovery:
Condolence-from "con," a suffix connected to the word "cum," meaning "with" and "dolor, doloris", a masculine noun (the second word is the noun in the genitive form) meaning "pain, grief."
So if you give condolences to someone, it's because you are with them in their grief. It just makes the word mean a bit more when you understand it-that's what's so cool about language!