Talaz is a word that means "wave, tornado" in Turkish dialects. dalga means "wave" in Turkish. You can use the following two links to look up the word's attestations throughout history:
When I saw the word "thalassa" which was defined as Pre-Greek and was not given its etymology, I did not have much foreignness. Because it continues to be used in Turkish dialects. And I think this word, defined as Pre-Greek, is one of the oldest traces of Pre- Turkic.
NOTE : talaz may be loanword from Greek, in Turkish ? I am not sure. I am not a Turkish propagandist.
( sorry for English )