What if the words were not meant to mean?

As soon as the human development a system of words, we begin to give names to all the things around us, for things that what we can see, and even for what we can not see.

What if the names that were given the the things were not use to meant? What if the "horse" that we know of was named "lion" or "water"?

At the end of the movie "Lucy", which someone said that this movie sucks, where Lucy explain that human are limiting themselves to the knowledge by setting some system to let us understand, I have a thought that what if all the things that us know of was not meant like we know of ?

The English word of lion is l.i.o.n., so if this word is not the meaning it used to mean, then what if I swap the name of lion as "sheep", and the sheep will be called "lion"? Then, the "sheep" will be eating "lion", and the "lion" eats grass.

Another example for Chinese word, the Chinese word were develop by the shape of the respective object. For the Chinese word water is look like a flowing river at the very beginning. But for the pronunciation was given  by human themselves. Then if I change the pronunciation of water ("Shui") into soil("Tu"), then we'll be drinking dirt and the goldfish lives in the soil.

Another simpler example, if the word "you" means I, and the word "I" means you, then we'll be asking, "How do I do?" Then the answer will be, "You are fine, thank I". Funny?

Then have an actual example using a word with many meanings:

"Can you can a can like a cannery can can a can?"

Confusing?