679. aptaistos
Lexical Summary
aptaistos: Without stumbling, faultless, blameless

Original Word: ἄπταιστος
Part of Speech: Adjective
Transliteration: aptaistos
Pronunciation: ap-tah'-ee-stos
Phonetic Spelling: (ap-tah'-ee-stos)
KJV: from falling
NASB: stumbling
Word Origin: [from G1 (α - Alpha) (as a negative particle) and a derivative of G4417 (πταίω - stumble)]

1. not stumbling
2. (figuratively) without sin

Strong's Exhaustive Concordance
without stumbling, without sin

From a (as a negative particle) and a derivative of ptaio; not stumbling, i.e. (figuratively) without sin -- from falling.

see GREEK a

see GREEK ptaio

NAS Exhaustive Concordance
Word Origin
from alpha (as a neg. prefix) and ptaió
Definition
without stumbling
NASB Translation
stumbling (1).

Thayer's Greek Lexicon
STRONGS NT 679: ἄπταιστος

ἄπταιστος, ἀπτιαστον (πταίω, which see), not stumbling, standing firm, exempt from falling (properly, of a horse, Xenophon, de re eq. 1, 6); metaphorically: Jude 1:24. (Cf. Winers Grammar, 97 (92); Buttmann, 42 (37).)

Topical Lexicon
Concept Overview

Derived from a verb meaning “to stumble,” the adjective ἀπταίστους in Jude 1:24 depicts a state of being kept so securely by God that no fall can occur. The idea touches every dimension of redemption: present perseverance, ongoing sanctification, and future glorification.

Old Testament Foundations

Old Covenant writers frequently pictured Yahweh as the guardian of His people’s steps. Psalm 121:3 declares, “He will not allow your foot to slip; your Protector will not slumber”. Proverbs 4:11-12 promises that the path of wisdom will keep the feet from faltering. These verses prepare the theological soil for Jude’s doxology, where the God who guarded Israel now guards every believer in Messiah.

New Testament Usage

ἀπταίστους appears once, in Jude 1:24: “Now to Him who is able to keep you from stumbling and to present you unblemished in His glorious presence with great joy”. The lone occurrence is strategic. Jude’s short letter warns against apostasy (Jude 1:3-23); the final doxology grounds the church’s confidence, not in human vigilance, but in divine power. Other writers echo the theme with different vocabulary—“you will never stumble” (2 Peter 1:10) and “no one will snatch them out of My hand” (John 10:28)—but Jude concentrates the promise into one Spirit-inspired word.

Theological Significance

1. Divine Preservation. God’s ability “to keep” confirms His absolute sovereignty over the believer’s perseverance (Philippians 1:6; 1 Thessalonians 5:23-24).
2. Present Sanctification. The term does not imply sinless perfection in this life; rather, God guards the believer from the fatal fall of apostasy (1 John 2:19; Romans 14:4).
3. Eschatological Presentation. The same God who keeps now will one day “present you unblemished” (Colossians 1:22; Ephesians 5:27). ἀπταίστους therefore bridges the “already” of sanctification and the “not yet” of glorification.
4. Covenant Consistency. From Israel’s wilderness wanderings to the church age, Scripture testifies that salvation is initiated, maintained, and consummated by the Lord alone.

Historical Reception

Early Christians incorporated Jude 24-25 into baptismal liturgies and evening prayers, celebrating God’s safeguarding grace. Chrysostom highlighted the verse to assure penitents that genuine repentance would not end in ruin. During the Reformation, the text fortified discussions on the perseverance of the saints; post-Reformation hymnody (e.g., Charles Wesley’s “To Him Who Is Able”) echoed the same hope.

Practical Ministry Application

• Pastoral Assurance: When counseling believers plagued by fear of failure, Jude 1:24 provides an anchor.
• Discipleship: Teachers can balance the call to contend for the faith (Jude 1:3) with confidence that God secures the outcome.
• Worship: The doxology offers a ready benediction that magnifies God’s keeping power.
• Evangelism: Presenting salvation as both gift and safeguard invites hearers to trust a Savior who not only forgives but also preserves.

Related Biblical Themes and Texts

Psalm 37:23-24; Isaiah 40:11; Romans 8:30; 1 Corinthians 1:8; 1 Peter 1:5. Each reference affirms, in complementary language, the reality encapsulated by ἀπταίστους.

Summary

Strong’s Greek 679 crystallizes the gospel promise of an unwavering walk sustained by divine grace. Believers contend, grow, and worship with confidence, knowing that the God who called them is also the One “able to keep [them] from stumbling.”

Forms and Transliterations
απταιστους απταίστους ἀπταίστους aptaistous aptaístous
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Jude 1:24 Adj-AMP
GRK: φυλάξαι ὑμᾶς ἀπταίστους καὶ στῆσαι
NAS: to keep you from stumbling, and to make you stand
KJV: you from falling, and
INT: to keep you without stumbling and to set [them]

Strong's Greek 679
1 Occurrence


ἀπταίστους — 1 Occ.

678
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