IPA: /ʌnˈɔːθədɒk/
KK: /ʌnˈɔrθədɑk/
Not following traditional or accepted beliefs or practices; different from what is usual or expected.
Her unorthodox approach to teaching made the class more engaging and fun.
Unorthodox → It is formed from "un-" (meaning not) and "orthodox" (from Greek "orthodoxos", where "ortho-" means correct or straight and "doxa" means opinion or belief). The word "unorthodox" means not conforming to established or accepted beliefs or practices.
Think of 'not' ('un-') following 'correct opinion' ('orthodox') — that's why unorthodox means not following the usual beliefs.