IPA: /aʊtˈduːər/
KK: /aʊtˈduːər/
A person or thing that surpasses or exceeds others in performance or achievement.
In the competition, she proved to be the outdoer, achieving the highest score.
Outdoer → It is formed from "out-" (meaning beyond or surpassing) and "doer" (from Old English "dōian", meaning to perform or act). The word "outdoer" refers to a person who surpasses or performs better than others.
Think of someone who goes 'beyond' ('out-') in their actions ('doer') — that's why an outdoer is someone who excels or surpasses others.