Learn how to say Peremptoriness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word peremptory:
insisting on immediate attention or obedience, especially in a brusquely imperious way:
‘Just do it!’ came the peremptory reply
Law not open to appeal or challenge; final:
a peremptory order of the court
late Middle English (as a legal term): via Anglo-Norman French from Latin peremptorius ‘deadly, decisive’, from perempt- ‘destroyed, cut off’, from the verb perimere, from per- ‘completely’ + emere ‘take, buy’