irreligious
adjective /ˌɪrɪˈlɪdʒəs/
/ˌɪrɪˈlɪdʒəs/
(formal)- without any religious belief; showing no respect for religionWord Originlate Middle English: from Latin irreligiosus, from in- ‘not’ + religiosus (from religio ‘reverence, obligation’, perhaps based on Latin religare ‘to bind’).