Unbeliever (ἄπιστος)

Luke 12:46; 1 Corinthians 6:6; 1 Corinthians 14:23; 2 Corinthians 6:14; 2 Corinthians 6:15; 1 Timothy 5:8; Matthew 17:17; Mark 9:19; Luke 9:41; John 20:27
The name given in scripture to the class of persons who have not faith in the divine revelation of the gospel (Luke 12:4646The lord of that servant will come in a day when he looketh not for him, and at an hour when he is not aware, and will cut him in sunder, and will appoint him his portion with the unbelievers. (Luke 12:46); 1 Cor. 6:66But brother goeth to law with brother, and that before the unbelievers. (1 Corinthians 6:6); 1 Cor. 14:2323If therefore the whole church be come together into one place, and all speak with tongues, and there come in those that are unlearned, or unbelievers, will they not say that ye are mad? (1 Corinthians 14:23); 2 Cor. 6:1414Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? (2 Corinthians 6:14)). The word is translated “infidel” (2 Cor. 6:1515And what concord hath Christ with Belial? or what part hath he that believeth with an infidel? (2 Corinthians 6:15); 1 Tim. 5:88But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel. (1 Timothy 5:8)); and “faithless” (Matt. 17:1717Then Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I suffer you? bring him hither to me. (Matthew 17:17); Mark 9:1919He answereth him, and saith, O faithless generation, how long shall I be with you? how long shall I suffer you? bring him unto me. (Mark 9:19); Luke 9:4141And Jesus answering said, O faithless and perverse generation, how long shall I be with you, and suffer you? Bring thy son hither. (Luke 9:41); John 20:2727Then saith he to Thomas, Reach hither thy finger, and behold my hands; and reach hither thy hand, and thrust it into my side: and be not faithless, but believing. (John 20:27)).