806. asphalós
Lexical Summary
asphalós: Secure, certain, safe

Original Word: ἀσφαλής
Part of Speech: Adverb
Transliteration: asphalós
Pronunciation: as-fal-OS
Phonetic Spelling: (as-fal-oce')
KJV: assuredly, safely
NASB: certain, securely, under guard
Word Origin: [adverb from G804 (ἀσφαλής - certain)]

1. securely
{literally or figuratively}

Strong's Exhaustive Concordance
assuredly, safely.

Adverb from asphales; securely (literally or figuratively) -- assuredly, safely.

see GREEK asphales

HELPS Word-studies

Cognate: 806 asphalṓs (an adverb, derived from 1 /A "not" and sphallō, "totter, cause to fall") – "firmly, steadfastly" (WS, 227). See 804 (asphalēs).

NAS Exhaustive Concordance
Word Origin
adverb from asphalés
Definition
safely
NASB Translation
certain (1), securely (1), under guard (1).

Thayer's Greek Lexicon
STRONGS NT 806: ἀσφαλῶς

ἀσφαλῶς, adverb (from Homer down), safely (so as to prevent escape): Mark 14:44; Acts 16:23. assuredly: γινώσκειν, Acts 2:36 (εἰδότες, Wis. 18:6).

Topical Lexicon
Meaning and Scope

Strong’s Greek 806 conveys the idea of acting or knowing “in a secure, certain, or reliable manner.” It speaks to conditions that are firm, unhindered by doubt, and incapable of failure. Whether describing physical custody, intellectual conviction, or spiritual confidence, the term highlights an environment where outcomes are sure and uncontested.

Occurrences in Scripture

1. Mark 14:44 – Judas instructs the arresting party to lead Jesus away “securely,” underscoring the desire for an unassailable apprehension of the Lord.
2. Acts 2:36 – Peter proclaims, “Therefore let all Israel know with certainty that God has made this Jesus, whom you crucified, both Lord and Christ.” The resurrection establishes an unshakeable foundation for faith.
3. Acts 16:23 – After severe flogging, Paul and Silas are placed under orders to be kept “securely,” reflecting Roman insistence on fail-safe detention.

Historical Context

In first-century Judea and the wider Roman Empire, legal and military systems prized absolute control. Jewish leaders feared public backlash if Jesus escaped; Roman magistrates feared loss of authority if prisoners fled. The adverb therefore captures an era when power structures sought unbreakable safeguards, even as God’s sovereign purposes quietly overturned human precautions (compare Acts 16:26).

Theological Significance

• Certainty of Christ’s identity – Acts 2:36 positions the word at the heart of apostolic preaching. The Spirit-empowered declaration removes every shadow of uncertainty about Jesus’ exaltation.
• Reliability of divine purpose – Human attempts to bind or silence God’s servants (Mark 14; Acts 16) only serve the larger, infallible plan. The term becomes an ironic witness: men try to secure their objectives, yet God secures redemption.
• Assurance for believers – What God has accomplished “securely” cannot be reversed. Salvation rests on a finished work as certain as the empty tomb (Hebrews 6:19).

Related Biblical Themes

• Assurance (plerophoria, Colossians 2:2) – inner conviction complements the outward certainty expressed by 806.
• Confidence (pepoithesis, 2 Corinthians 3:4) – the believer’s settled trust flows from God’s unfailing security.
• Preservation (tēreō, Jude 1) – divine guardianship guarantees the saints’ ultimate safety.

Practical Ministry Applications

• Evangelism – Present the gospel with the same “certainty” Peter exhibited, grounding appeals in the historical fact of the resurrection.
• Pastoral care – Encourage struggling believers that their salvation is held “securely” beyond the reach of accusation or failure (John 10:28-29).
• Discipleship – Cultivate habits of faith anchored in the immovable promises of Scripture, countering a culture of doubt.

Christological Implications

Every appearance of the adverb circles back to Jesus. The authorities try to arrest Him securely; the apostles proclaim Him securely; the imprisoned missionaries trust Him securely. The word therefore frames Christ as the fixed point around which human history, personal salvation, and eternal destiny revolve.

Conclusion

Strong’s Greek 806 threads through pivotal New Testament moments to highlight a divine certainty that dwarfs human efforts at security. It calls the church to stand, speak, and suffer with quiet confidence, knowing that what God has decreed is already established “securely” forever.

Forms and Transliterations
ασφαλως ασφαλώς ἀσφαλῶς asphalos asphalôs asphalōs asphalō̂s
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Englishman's Concordance
Mark 14:44 Adv
GRK: καὶ ἀπάγετε ἀσφαλῶς
NAS: Him and lead Him away under guard.
KJV: and lead [him] away safely.
INT: and lead [him] away securely

Acts 2:36 Adv
GRK: ἀσφαλῶς οὖν γινωσκέτω
NAS: know for certain that God
KJV: of Israel know assuredly, that God
INT: Assuredly therefore let know

Acts 16:23 Adv
GRK: τῷ δεσμοφύλακι ἀσφαλῶς τηρεῖν αὐτούς
NAS: the jailer to guard them securely;
KJV: to keep them safely:
INT: the jailor safely to keep them

Strong's Greek 806
3 Occurrences


ἀσφαλῶς — 3 Occ.

805
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