First Words?

There is evidence of ancient words, words that have not changed significantly for thousands of years, and have traveled from one language to another.  These are called cognates.  There are cognates that you can trace through the earliest languages, and it is theorized that perhaps these come from a common source; a theoretical language that they call Protoindoeuropean, or P.I.E.  P.I.E is not a real language, it is one that they reconstruct from all the language branches where they can find a large quantity of words that sound the same.  They call it a reconstructed parent language.  Anyways, there are certain words that sound alike, and have graphic similarities.    If you want a really extensive chart of various cognates, it is here:
There is a study recently done at the University of Reading, in England, that postulates that a few words are “ultra conserved” or that have retained most of their structure longer than other cognates.   The study says that  these words have been around for 15, 000 years.
7 – thou
6 – I
5 – not, that, we, to give, who
4 – this, what, man/male, ye, old, mother, to hear, hand, fire ,to pull, black, to flow, bark, ashes, to spit, worm
The numbers on the left hand side indicate the number of language families where these words have been found to exist.
  Although this evidence does not accurately define the first words, since the cognitive revolution which gave us language is older than 15, 000 years, it gives us some insight for further discussion.  They say that the earliest tools are 50,000 years ago, and I wonder if these tools came before language.  It is an interesting question.
 These are old words that have only been modified slightly through many different languages, giving us evidence of a time when all humans may have lived much closer together, and used words that sounded similar.
 Perhaps then, on the African Savannah 100,000 years ago, someone first uttered a word like “you”.
Anyways, I hope you are doing well, and here is the link to the article: