Juggernaut (noun): a literal or metaphorical force or object regarded as unstoppable, merciless, and destructive, and often, by implication, out of control.
The word comes from an early translation in English of the name Jagannath. During the mid-19th century, some European travellers were observing the Hindu festival of Ratha Yatra in Puri, India. During this a procession of massive wooden chariots (called temple cars) carrying a statue of the deity were pulled through the streets. These chariots were incredibly heavy and nearly impossible to steer or stop quickly once in motion, Reports emerged that people deliberately allowed themselves to be crushed beneath the vehicle's wheels as a sacrifice. It's now thought these reports were an exaggeration or misinterpretation of actual events, but the false reports spread throughout Europe and America.
In the latter half of the 20th Century the term juggernaut was frequently used in the United Kingdom to describe any large heavy truck or articulated lorry (thought to be just as unstoppable)
The term is more commonly used nowadays for any form of powerful force or movement, thought by many to be unstoppable.
Finally, Marvel Comics fans will remember the Juggernaut (Cain Marko), a character created by writer Stan Lee and artist/co-writer Jack Kirby to fight the X-Men. He possessed superhuman strength and durability, and was virtually immune to most physical attacks; his helmet also protected him from mental attacks.









