worry is the worst disease of our modern times.Care is contagious; it is hard work being cheerful at a funeral,and it is a good deal harder to keep the frown from your facewhen you are in the throng of the worry worn ones.
Question：How do you explain this phrase “worry worn ones”
In grammar?

Question

Answer

"Worry-worn ones" is being used to describe people who've been worn by worry. In other words, worrying has made them depressed and /or tired.

Grammatically, "worry-worn" is a compound adjective (so it should be hyphenated), and "ones" is a pronoun.