It first came into speech in the pre-historic times when the
cavemen first came in contact with a fire on a tree ignited from a
lightning on one stormy day (exact location not known, scientist
are trying to locate the "ancient tree" that first caught fire by
the lightning) .. the moment the cavemen touched the fire, they
shouted "TOH!!! TOH!!! TOH!!"... as time went by..it gradually was
changed by some scholars in England (once again..the scientists are
also trying to find the names of the scholars who implemented
thechange) and came to be pronounced and spelled as HOT as it
seemed and sounded more approriate than TOH..
for more details you can click on this link below for the exact
full story -
Exact origin
of the word Hot[/ur]