ἄπιστος
apistos
unbelieving
from Α (as a negative particle) and πιστός; (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).
Mark 9:19 · Word #8
Lexicon G571
| Lemma | ἄπιστος |
| Transliteration | ápistos |
| Strong's | G571 |
| In-context | unbelieving |
| Literal | unbelieving |
Morphology ADJ.A VOC F SG
All morphology codes
| Part of Speech | ADJ.A — Attributive Adjective — Describes a noun directly |
| Case | VOC — Vocative — Direct address |
| Gender | F — Feminine — Grammatical feminine |
| Number | SG — Singular — One |
Lexical Info
| Lemma | ἄπιστος |
| Strong's | G571 |
SIBI-P1 G571-04
un-faithful one (nominative masculine singular)
| Root | ἄπιστος (apistos) |
| Core Meanings | unfaithful, unbelieving, untrusting, unreliable |
| Semantic Range | without faith, not trusting, unbelieving, faithless, unreliable, untrustworthy, outsider to the faith, incredible (of things) |
| Conceptual Significance | In the New Testament, ἄπιστος often contrasts with πιστός (“faithful, believing”), marking the boundary between trust and distrust toward God or Messiah. It can denote moral unreliability, spiritual unbelief, or covenantal non-allegiance, highlighting the centrality of faith/trust in biblical theology. |
| Morphological Notes | Adjective from ἀ- (negative prefix) + πιστός. Forms attested include vocative feminine singular (direct address to an un-faithful woman) and nominative masculine singular (subject or substantive, “an un-faithful man/one”). Functions adjectivally or substantivally. |
| Rendering Rationale | The term combines the negative prefix ἀ- with πιστός (faithful, trusting, trustworthy), literally meaning “not-faithful” or “without trust.” Rendering it as “un-faithful one” preserves the visible connection to faith/trust (πίστις/πιστός) while the nominative masculine singular form reflects its grammatical use as a substantive adjective referring to a specific person. |
AI-generated (openai/gpt-5.2-chat-latest)
Words from Root ἄπιστος (unfaithful, unbelieving, untrusting, unreliable)
| SILEX Code | Transliteration | SIBI-P1 |
|---|---|---|
G571-01 |
apistoi | the without-faith ones |
G571-02 |
apistois | to the un-faithful ones |
G571-03 |
apiston | un-faithful one(s) / un-faithful thing (inflected by case, gender, and number: e.g., "of un-faithful ones" [genitive masculine plural], "an un-faithful thing" [nominative/accusative neuter singular], "an un-faithful woman" [accusative feminine singular], |
Word Usage (23 occurrences of G571)
| Location | Form | Transliteration | Meaning |
|---|---|---|---|
| Matthew 17:17 | ἄπιστος | apistos | |
| Mark 9:19 | ἄπιστος | apistos | unbelieving |
| Luke 9:41 | ἄπιστος | apistos | faithless |