PEREMPTORY
- (esp. of a person's manner or actions) Insisting on immediate attention or obedience, esp. in a brusquely imperious way
- Not open to appeal or challenge; final
- is a formal word used especially in legal contexts to describe an order, command, etc.
- means expressive of urgency or command or marked by arrogant selfassurance.
- putting an end to or precluding a right of action, debate, or delay [adj PEREMPTORILY]