IPA: //ˌʌltɪˈmeɪtnəs//
KK: /ʌltəˈmeɪtnəs/
The state or quality of being the final or most important in a series or process.
The ultimateness of her decision left no room for further discussion.
Ultimateness → It is formed from "ultimus" (meaning last or final) and the suffix "-ness" (meaning the state or quality of). The word "ultimateness" refers to the state of being the last or final in a series or process.
Think of 'last' ('ultimus') to remember that 'ultimateness' means the quality of being the final or last.