The English word
titanic, meaning "enormous, exceptionally strong, massive," comes from the name of the Greek gods called
Titans, the children of Gaia (Earth) and Uranus (Sky). The Titans were gigantic in size and incredibly strong; they ruled the world until they were overthrown by Zeus and the Olympian gods and imprisoned in Tartarus. Two of the most famous Titans are Atlas and Prometheus. You can read more about the Titans at
Wikipedia.
The word "titanic" acquired a new, and ironic, meaning as Titanic, the name of the enormous ocean liner which hit an iceberg and sank in 1912, a disaster in which more than 1500 people died. You can read more about the Titanic at
Wikipedia.
The image below is an
illustration by Gustave Doré of Dante's Inferno; it shows the Titans chained in the underworld: