say it: URTH-shay-king
earthshaking is an adjective meaning "loud enough to shake the very earth". It carries 2 recorded senses.
loud enough to shake the very earth
sufficiently significant to affect the whole world
“earthshaking proposals”
“the contest was no world-shaking affair”
“the conversation...could hardly be called world-shattering”
Definitions, synonyms and semantic relations for earthshaking come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.