Laureth, in my opinion, has it pretty much right. Words are symbols. Think about what the problem we face is. We preceive things outside of us. Different shapes, different sounds or smells, different activities. At some point way back in prehistory, we achieve the ability to conceive of these things. I.e., to think.
The chair is not in our minds. It is out there. So what is in our minds? The idea of the chair. Now, we want to communicate our ideas. How do we do it? We need mutually agreed upon symbols for the chair. What form will our symbols take? We have many options. We could use smells (if we could control them well); we could use touch; we could use sound; and we could use sight.
The first symbols for our ideas (which represent things we perceive) were sounds. The sounds used are utterly arbitrary. You can see that there are (or were) thousands of languages, and in most of them, there was a word for chair, and some of those words for chair sounded completely different from any of the others.
Later on, we wanted to communicate to people over time, and to store our ideas for later retrieval. To do this, written symbols were developed. Languages developed their own symbols to create symbols of sounds (which are symbols of ideas, which are symbols of things we perceive).
Again, writing systems are arbitrary. Some systems have one symbol for every word. Others use an alphabet that is combined in different ways to represent words. Sometimes it is not obvious how to tell what a word sounds like from the way a word is symbolized. Phonetic alphabets are more useful in this sense than ideogram systems (like Chinese).
Words come from some arbitrary association of sound with idea that happened far, far ago. Of course, it is still happening today. The word “iPhone” didn’t exist a decade or two ago.
Nowadays, the sound of new words tends to relate to sounds of old words. This is why it is interesting to look at the derivation of words, and trace their history back through the ages. Most of this is done by tracing word history in writing. Nowadays, with the availability of sound recording, we can trace (for a little over 100 years) the origin of sounds as well as written symbols.
Thomas Edison recorded the first words in 1877. It was recorded on a tinfoil cylinder phonograph. The recorded words were `Mary had a little lamb`. Some day, people will listen to those words to see how english was spoken over a century ago.
Remember, words aren’t really words. They are sounds that represent symbols that represent ideas that represent thing in the consensus reality. Words are provisional. It doesn’t matter what they sound like, so long as everyone can agree that the sound represents the same thing. Pickle? Dog? It’s irrelevant, as long as we agree that dog means the animal, and pickle means a cucumber, or vice versa.
Go now, and create new words!