ELI5: Explain Like I'm 5

Polish-Lithuanian (adjective)

So, you know how you have a name, like Sam, and your friend might have a different name, like Lily? And just like people have different names, countries have different names too! Poland and Lithuania are two countries, and they have their own names.

But sometimes, we want to talk about things that are related to BOTH of those countries. So to do that, we use a special word called a "polish-lithuanian" adjective. When we say something is "polish-lithuanian", we mean that it comes from or is related to BOTH Poland and Lithuania at the same time. It's like a special way of saying that something is from two places at once!