His unbelieving mind struggled to comprehend the situation.
unbelieving expression
Frequency:
50
%
He wore an unbelieving expression as he heard the announcement.
unbelieving heart
Frequency:
45
%
Her unbelieving heart couldn't accept the news.
Idiomatic Expressions for unbelieving
Phrase: skepticism abounds
Meaning: There is a widespread attitude of doubt or disbelief.
Usage: In the face of the new scientific discovery, skepticism abounds among the scientific community.