dis ‧ be ‧ lief /ˌdɪsbəˈliːf, ˌdɪsbɪˈliːf/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ belief , ↑ disbelief , ↑ believer ; adjective : ↑ believable ≠ ↑ unbelievable , ↑ disbelieving ; verb : ↑ believe ≠ ↑ disbelieve ; adverb : ↑ unbelievably ]
a feeling that something is not true or does not exist ⇨ unbelief , belief :
The reaction to the murders was one of shock and disbelief.
in/with disbelief
Rosie stared in disbelief.