burden
Definitions
A load, typically a heavy one, that is carried.
A duty, responsibility, or misfortune that causes hardship or distress.
The main theme or gist of a speech, book, or argument.
Examples
She carried the heavy burden of responsibility for her entire family.
The new tax laws will place an unfair financial burden on small business owners.
He felt a great sense of relief after finally sharing the burden that had been weighing on his mind.