IPA: /ˌʌntrəˈdɪʃənəli/
KK: /ʌntrəˈdɪʃənəli/
In a way that does not follow traditional methods or practices.
She approached the project untraditionally, using innovative techniques that surprised everyone.
Untraditionally → It is formed from "un-" (meaning not) and "tradition" (from Latin "traditio", meaning handing over or delivery) and "-ally" (meaning in a manner). The word "untraditionally" means in a manner that is not in accordance with tradition.
Think of 'not' ('un-') following the 'handing over' ('traditio') of customs, which helps you remember that 'untraditionally' means doing things in a way that goes against established customs.