Someone who feels very sad about something.
A sorrower might need help or comfort.
Examples:
The sorrower cried because his pet ran away.
The sorrower needed a hug.
The sorrower felt very bad about what happened.
The little sorrower needed a cookie to feel better.
The sorrower was so sad, he cried a river.
The sorrower was the saddest person in the whole world.