Tiamat was later known as Thalattē (as a variant of thalassa, the Greek word for "sea") in the Hellenistic Babylonian writer Berossus' first volume of universal history. It is thought that the name of Tiamat was dropped in secondary translations of the original religious texts (written in the East Semitic Akkadian language) because some Akkadian copyists of Enûma Elish substituted the ordinary word for "sea" for Tiamat, since the two names had become essentially the same due to association.[5]