Today's word from mythology is "Herculean," which means something that requires a mighty effort or great strength. A Herculean task is a task that would require the strength of the great hero Hercules, or Heracles, as the Greeks called him; Hercules is his Roman name. You can read about the famous Labors of Hercules at
Wikipedia.
The image below shows
Hercules capturing the Cerberus, the three-headed hound of hell, which was the last of the twelve labors: