UNBELIEVER
Meaning of UNBELIEVER in English
un ‧ be ‧ liev ‧ er /ˌʌnbəˈliːvə, ˌʌnbɪˈliːvə $ -ər/ BrE AmE noun [countable]
someone who does not believe in God or a particular religion
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012