Word Summary
apistos: incredible, unbelieving
Original Word: ἄπιστος
Transliteration: apistos
Phonetic Spelling: (ap'-is-tos)
Part of Speech: Adjective
Short Definition: incredible, unbelieving
Meaning: incredible, unbelieving
Strong's Concordance
faithless, unbelieving.

From a (as a negative particle) and pistos; (actively) disbelieving, i.e. Without Christian faith (specially, a heathen); (passively) untrustworthy (person), or incredible (thing) -- that believeth not, faithless, incredible thing, infidel, unbeliever(-ing).

see GREEK a

see GREEK pistos

Thayer's Greek Lexicon
STRONGS NT 571: ἄπιστος

ἄπιστος, ἄπιστον (πιστός) (from Homer down), without faith or trust;

1. unfaithful, faithless (not to be trusted, perfidious): Luke 12:46; Revelation 21:8.

2. incredible, of things: Acts 26:8; (Xenophon, Hiero 1, 9; syrup. 4, 49; Cyril 3, 1, 26; Plato, Phaedr. 245 c.; Josephus, Antiquities 6, 10, 2, etc.).

3. unbelieving, incredulous: of Thomas disbelieving the news of the resurrection of Jesus, John 20:27; of those who refuse belief in the gospel, 1 Corinthians 6:6; 1 Corinthians 7:12-15; 1 Corinthians 10:27; 1 Corinthians 14:22ff; (1 Timothy 5:8); with the added idea of impiety and wickedness, 2 Corinthians 4:4; 2 Corinthians 6:14f of those among the Christians themselves who reject the true faith, Titus 1:15. without trust (in God), Matthew 17:17; Mark 9:19; Luke 9:41.