Unbeliever - Vine's Expository Dictionary of New Testament Words

Unbeliever

[ 1,,G571, apistos ]
an adjective, is used as a noun, rendered unbeliever" in 2 Corinthians 6:15; 1 Timothy 5:8, RV; plural in 1 Corinthians 6:6; 2 Corinthians 6:14; AV only, Luke 12:46 (RV, "unfaithful"). See BELIEF, C, Note
(3) FAITHLESS, INCREDIBLE.

Vine's Expository Dictionary of New Testament Words