pe·remp·to·ry 1 /pə-'remp-tə-rē/ adj [Late Latin peremptorius, from Latin, destructive, from perimere to take entirely, destroy]
1: permitting no dispute, alternative, or delay; specif: not providing an opportunity to show cause why one should not comply
when the right to require the performance of the act is clear and it is apparent that no valid excuse can be given for not performing it, a peremptory mandamus may be allowed — Revised Statutes of Nebraska
pe·remp·to·ri·ly /pə-'remp-tə-rə-lē, -ˌremp-'tōr-ə-lē/ adv
pe·remp·to·ri·ness /-'remp-tə-rē-nəs/ n
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.