IPA: /ɪnˈkrɛdʒ.ə.ləs/
KK: /ɪnˈkrɛdʒələs/
Showing a lack of belief or being unwilling to accept something as true.
She gave him an incredulous look when he told her the news.
Incredulous → It is formed from "in-" (meaning not) and "credulus" (from Latin, meaning believing). The word "incredulous" describes a state of not believing or being unwilling to believe something.
Think of 'not' ('in-') believing ('credulus') — that's why incredulous means being unable to accept something as true.