(a.) Having, or acknowledging, no God; without reverence for God; impious; wicked.

agnostic atheistic blasphemous damned evil graceless hellish impious infidel iniquitous irreligious lost nonreligious nullifidian profane reprobate sacrilegious sceptical shriftless sinful un-Christly unangelic unbelieving unchristian unconverted ungodly unholy unredeemed unregenerate unreligious unrighteous unsaintly wicked