Quietus (noun)

1. Death or the end of something.
2. A settlement of a debt or obligation.

Origin:

The word quietus comes from the latin word "quiētus" meaning a release or relief from something. it can refer to death or the end of something, or a settlement of a debt or obligation.

Examples:

1. The disease finally brought him to his quietus.
2. The company's financial troubles were put to quietus with the merger.
3. He had always feared a quietus by his own hand.
4. The quietus of the relationship came as a surprise to both of them.
5. The quietus of the old regime was marked by a series of uprisings.