momentous C2+ Topic:Space, Position & Direction US /moʊˈmɛntəs/ UK /məˈmɛntəs/ See IPA manual Meanings 1 adj of great importance or far-reaching consequence The treaty's signing was a momentous occasion for the entire region. Thesaurus Synonyms 1 adj · of great importance or... importantsignificantweightyconsequentialfatefulhistoric ↔ Opposites trivialinsignificantunimportantinconsequential Word family Derived forms momentouslymomentousness Related forms momentmomentum Etymology AI details From moment (in the sense 'importance, weight') + -ous; moment derives from Latin mōmentum ('movement, weight, importance'), from movēre ('to move'). mōmentum Latin movēre Latin View etymology graph -> Topics Space, Position & Direction Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # momentous **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /moʊˈmɛntəs/ **IPA (UK):** /məˈmɛntəs/ ## Meanings 1. of great importance or far-reaching consequence ## Examples - The treaty's signing was a momentous occasion for the entire region. ## Synonyms - important - significant - weighty - consequential - fateful - historic ## Antonyms - trivial - insignificant - unimportant - inconsequential ## Derived Forms - momentously - momentousness ## Related Forms - moment - momentum ## Roots and Affixes - Root: mōmentum - Root: movēre ## Etymology From moment (in the sense 'importance, weight') + -ous; moment derives from Latin mōmentum ('movement, weight, importance'), from movēre ('to move'). ## AI Etymology Momentous comes from moment (in the sense 'importance, weight') + -ous; moment derives from Latin mōmentum ('movement, weight, importance'), from movēre ('to move'). The etymological trail includes Latin mōmentum, Latin movēre. The same word family includes momentously, momentousness, moment, momentum. Its current adjective use means "of great importance or far-reaching consequence". ## Topics - Space, Position & Direction - Word Formation & Derivatives markdown