Megaquake

Part of speech: noun

Definitions

1. An exceptionally large and powerful earthquake causing extensive damage and ground shaking ; a seismic event of massive magnitude often resulting in widespread destruction and potential tsunamis ; an extraordinary tectonic disturbance releasing enormous energy along faults and generating significant geological impact
2. A colossal subterranean tremor characterized by intense ground movement and severe destruction ; a major earth tremor significantly affecting large regions and potentially triggering aftershocks ; an enormous seismic activity event producing catastrophic effects on human structures and natural landscapes
3. A giant scale earthquake distinguished by immense seismic force and broad destructive reach ; a highly energetic tectonic shift causing substantial harm to infrastructure and natural environment ; a profound earth vibration event marked by vast ground displacement and disaster potential

Etymology: The word is a plain compound: "mega-" joined to "quake." The prefix comes from the Ancient Greek "mégas," meaning "great" or "large," which passed into English as a combining form used to build words for things of enormous size. "Quake," the older element, is an ordinary English word for shaking or trembling, so the whole term means something like a "great shaking." The pairing is a modern formation rather than an old one. Scientists and writers attach "mega-" freely to existing words, which is why the prefix turns up in so many recent coinages, from "megabyte" to "megacity." Here it simply scales up "quake" to describe earthquakes far larger than ordinary ones.

Synonyms: major earthquake, large earthquake, great quake

Antonyms: microquake, minor earthquake, small quake