Peremptory (adjective)

1. Decisive and final, not subject to change.
2. High handed or dictatorial in manner.

Origin:

The word "peremptory" comes from the latin word "peremptorius" which means "decisive" or "unconditional". it is used to describe an action or decision that is final and not subject to change.

Examples:

1. The judge's peremptory ruling ended the case.
2. The peremptory deadline means that the project must be finished on time.
3. He gave a peremptory dismissal to the idea.
4. The peremptory command was met with resistance.
5. Her peremptory attitude caused resentment among her colleagues.