per·emp·to·ry 
(pə-rĕmptə-rē)
(pə-rĕmptə-rē)adj.
1.
a. Subject to no further debate or dispute; final and unassailable: a peremptory decree.
b. Not allowing contradiction or refusal; imperative: The officer issued peremptory commands.
2. Offensively self-assured; imperious or dictatorial: a swaggering, peremptory manner.
[Latin perēmptōrius, from perēmptus, past participle of perimere, to take away : per-, per- + emere, to obtain; see em- in the Appendix of Indo-European roots.]
per·empto·ri·ly adv.
per·empto·ri·ness n.