momentous
adjective
- having great or lasting importance: consequential, significant
Wiktionary
Pronunciation: /məʊˈmɛn.təs/ / /moʊˈmɛn.təs/
adj
Etymology: Etymology tree English moment Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ōtsos or *-otsos Latin -ōsus Old French -usbor. Middle English -ous English -ous English momentous From moment (“weight, importance”) + -ous.
- Outstanding in importance, of great consequence.
“The reason why I did not publish this book till the end of the last sessions of parliament was, because I did not care to interfere with more momentous affairs.”
“"It has been a momentous month, and I hope we shall all retain healthful recollections of it as long as we live."”