Momentous (adj)
mo-men-tus
of great or far-reaching importance or consequence.
Momentous, “of great or far-reaching importance or consequence,” is based on the noun moment and the adjective-forming suffix -ous. Moment comes from Latin mōmentum, literally meaning “motion” and figuratively signifying an influential element, such as a point in time.
Example sentences
“We should mark this momentous occasion.”