Composed of
four
ten; 10; (arch.) book containing a collection of poems
Used in vocabulary (3 in total)
forty-ninth day after a person's death
shoulder pain (at about age forty)
at age forty, one has no doubts
Examples (4 in total)
We have been enjoying peace for more than 40 years.
I think she is over forty years old.
At forty, he does not get as angry as he used to.