IPA: /pəˈrɛmp.tə.rɪ.nəs/
KK: /pəˈrɛmp.tə.rɪ.nəs/
The quality of being firm and commanding, leaving no room for refusal or debate.
The peremptoriness of his tone made it clear that there would be no discussion on the matter.
Peremptoriness → It is formed from "peremptorius" (from Latin, meaning final or decisive) and the suffix "-ness" (meaning the state or quality of). The word "peremptoriness" refers to the quality of being final or decisive, leaving no room for debate or delay.
Think of the word 'final' from 'peremptorius' to remember that 'peremptoriness' means the quality of being final or leaving no room for discussion.