Pronunciation: /ʌnbɪˈliːvər/
noun a person who does not believe in a particular religion or doctrine
A1 My friend is an unbeliever and does not believe in any religion.
A2 The unbeliever was skeptical about the existence of ghosts.
B1 The unbeliever was open to learning about different faiths and beliefs.
B2 As an unbeliever, she was often questioned about her lack of religious beliefs.
C1 The unbeliever's philosophical views challenged traditional religious doctrines.
C2 The renowned scientist was known for being an outspoken unbeliever in organized religion.