Decliner (noun)

1. A person who refuses or rejects an offer, invitation, or request.
2. A person who declines or decreases in power, wealth, or influence.

Origin:

From the verb decline, meaning to refuse or reject, and the suffix -er, indicating a person who performs an action.

Examples:

1. He was a polite decliner, never one to turn down an invitation or offer without a good reason.
2. She was a proud decliner, refusing the invitation to the party because she didn't want to be seen as a charity case.
3. The company was a reluctant decliner, declining the request for an interview because of the tight deadline.
4. He was a determined decliner, declining the offer of a promotion because he wanted to focus on his family.
5. The empire was an inevitable decliner, its power and influence decreasing over time as new civilizations emerged.