Well, I guess I don't need to explain any further what this topic is about.
To copy some earlier stated examples, I'll quote myself:
and KingOfTheIsles:"Copain" in French. It means "friend". This is, most likely (I think) derived from "coup" (means "cut") and "pain" ( means "bread"). "Couppain" would be "cut bread". Medieval times, and probably today also, when you share your bread with someone else, he is your friend. Simple as that
Dutch, now: "kameraad" is a modern word and also means friend. "Kamer" means "room" and "-aad" was an uncommon suffix that meant "mate" of some sorts. Your "room mate" would be someone who you share your bedroom with, in other words, your friend. Mind "comrade", and "Kamerad" in German.
and Wilpuri:Yes, it is interesting. For example, cheese. Cheese. Queso. Käse. And, um, fromage. Stupid French.
the Finnish verb 'To Understand', Ymmärtää. The word has its roots in the Finnish word for 'circle', ympyrä. It is a very old word, which was used as a hunting term, 'to surround' =ymmärtää, but nowadays it means 'to understan' and most people don't know the origins of it
To add some more myself, the Dutch word for Cheese is "kaas". About the "stupid French", they have a romanic language after all
I'll come up with more stuff later, I promise.