1596. hekousiós
Lexical Summary
hekousiós: voluntarily, willfully

Original Word: ἑκουσίως
Part of Speech: Adverb
Transliteration: hekousiós
Pronunciation: heh-koo-see-OS
Phonetic Spelling: (hek-oo-see'-ose)
KJV: wilfully, willingly
NASB: voluntarily, willfully
Word Origin: [adverb from a derivative from G1635 (ἑκών - voluntarily)]

1. willingly, voluntarily

Strong's Exhaustive Concordance
willfully, willingly.

Adverb from the same as hekousion; voluntarily -- wilfully, willingly.

see GREEK hekousion

HELPS Word-studies

Cognate: 1596 hekousíōs (an adverb, derived from 1595 /hekoúsion) – properly, willingly (willfully), i.e. "what is of free-will" (J. Thayer). See 1635 (hekōn).

NAS Exhaustive Concordance
Word Origin
from hekousios
Definition
voluntarily
NASB Translation
voluntarily (1), willfully (1).

Thayer's Greek Lexicon
STRONGS NT 1596: ἑκουσίως

ἑκουσίως, adverb (from Euripides down), voluntarily, willingly, of one's own accord: Hebrews 10:26 (ἑκουσίως ἁμαρτάνειν (A. V. to sin willfully) is tacitly opposed to sins committed inconsiderately, and from ignorance or from weakness); 1 Peter 5:2.

Topical Lexicon
Definition and Scope

The adverb ἑκουσίως (hekousiōs) describes an action performed freely, of one’s own accord, in full awareness and with deliberate intent. It stands in contrast to anything done by compulsion, ignorance, or external coercion.

Occurrences in Scripture

Hebrews 10:26 – “If we deliberately go on sinning after we have received the knowledge of the truth, no further sacrifice for sins remains”.
1 Peter 5:2 – “Be shepherds of God’s flock that is among you, watching over them, not out of compulsion, but willingly, as God desires; not out of greed, but eager to serve”.

Contextual Insights: Hebrews 10:26

Here ἑκουσίως characterizes ongoing, high-handed rebellion that parallels Numbers 15:30–31. Such sin knowingly tramples the Son of God and rejects the only atonement God has provided. The warning underscores personal responsibility: persistent, willful sin places the sinner under certain judgment (Hebrews 10:27–29).

Contextual Insights: 1 Peter 5:2

Peter directs elders to shepherd “willingly,” not from external pressure. The same adverb that condemns deliberate rebellion in Hebrews commends joyful, voluntary service here. Leadership offered freely mirrors Christ, who “lays down His life of His own accord” (John 10:18).

Theological Significance

1. Human Will and Accountability – Scripture consistently treats deliberate choices as morally weighty (Deuteronomy 30:19; Romans 6:16).
2. Grace-Empowered Obedience – Grace energizes believers to will and to act according to God’s good pleasure (Philippians 2:13).
3. Sacrificial Typology – The Mosaic distinction between inadvertent and high-handed sins finds new-covenant fulfillment in Hebrews; rejection of Christ’s sacrifice leaves no other remedy.

Pastoral Implications

• Church Discipline – Hebrews 10:26 provides theological basis for confronting ongoing, willful sin (Matthew 18:15-17).
• Leadership Motivation – Elders serve best when ministry flows from willing hearts, not mere obligation (2 Corinthians 9:7).
• Fostering Voluntary Devotion – Teaching believers to respond willingly cultivates spiritual health and guards against legalism.

Historical Usage in the Early Church

Early Christian writers stressed willingness in martyrdom, almsgiving, and ordination. The Didache exhorted believers to “give freely,” and Cyprian distinguished martyrs who died voluntarie (willingly) from those who capitulated under duress, reflecting the New Testament ideal.

Application for Ministry Today

Encourage voluntary participation in worship and service; identify and address patterns of deliberate sin; mentor leaders to shepherd by divine calling rather than human compulsion.

Related Concepts

• Προθυμία (“readiness of mind,” 2 Corinthians 8:11)
• Ἀναγκαστῶς (“under compulsion,” Philemon 1:14)
Psalm 110:3 LXX (“Your people will volunteer freely in the day of Your power”)

Further Study

Hebrews 6:4-6; John 10:17-18; 2 Corinthians 8:3-5; Ephesians 6:6; Isaiah 1:19

Forms and Transliterations
Εκουσιως εκουσίως Ἑκουσίως Ekousios Ekousiōs Hekousios Hekousiōs Hekousíos Hekousíōs
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Englishman's Concordance
Hebrews 10:26 Adv
GRK: Ἑκουσίως γὰρ ἁμαρτανόντων
NAS: For if we go on sinning willfully after
KJV: sin wilfully after
INT: [if] willingly indeed sin

1 Peter 5:2 Adv
GRK: ἀναγκαστῶς ἀλλὰ ἑκουσίως κατὰ θεόν
NAS: not under compulsion, but voluntarily, according
KJV: but willingly; not
INT: by constraint but willingly according to God

Strong's Greek 1596
2 Occurrences


Ἑκουσίως — 2 Occ.

1595
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