imperiling, challenging, or affecting basic beliefs, attitudes, relationships, etc.
earthshakingFind new words to share every day with Dictionary.com's Word of the Day. Discover the definition, pronunciation, and origin of uncommon words plus more!
notable, crucial, far-reaching, historic, fateful, significant, memorable, consequential, pivotal, eventful, meaningful, decisive, weighty, critical, determining, essential, imperative, important, indispensable, paramount
- earthquake engineer,
Origin of earthshaking
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
informal of enormous importance or consequence; momentous
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012