IPA: //dɪsˈbiːliːf//
KK: /dɪsˈbilɪf/
A feeling of not believing something or rejecting it as untrue.
Her disbelief in the story made it hard for her to enjoy the movie.
**Disbelief** → It is formed from "dis-" (meaning apart or away) and "belief" (from Old English "geleafa", meaning faith or trust). The word "disbelief" means the state of being apart from belief or lacking faith in something.
Think of being 'apart' ('dis-') from 'faith' or 'trust' ('belief') — that's why disbelief means not believing.