unbelieveˈ transitive verb and intransitive verb

1. To disbelieve
2. To refrain from believing
3. To cease to believe

unbelievedˈ adjective

unbelievˈer noun

1. A person who does not believe, esp in the prevailing religion
2. A habitually incredulous person

unbelievˈing adjective

unbelievˈingly adverb