4656. skotoó
Lexical Summary
skotoó: To darken, to obscure

Original Word: σκοτόω
Part of Speech: Verb
Transliteration: skotoó
Pronunciation: sko-to'-o
Phonetic Spelling: (skot-o'-o)
KJV: be full of darkness
NASB: darkened
Word Origin: [from G4655 (σκότος - darkness)]

1. to obscure or blind
{literally or figuratively}

Strong's Exhaustive Concordance
to darken

From skotos; to obscure or blind (literally or figuratively) -- be full of darkness.

see GREEK skotos

HELPS Word-studies

Cognate: 4656 skotóō – to darken; (figuratively) to produce a condition of moral, spiritual darkness (obscurity, blindness). See 4654 (skotizō).

NAS Exhaustive Concordance
Word Origin
from skotos
Definition
to darken
NASB Translation
darkened (3).

Thayer's Greek Lexicon
STRONGS NT 4656: σκοτόω

σκοτόω, σκότῳ: passive, perfect participle ἐσκοτωμενος; 1 aorist ἐσκοτώθην; (cf. WH's Appendix, p. 171); (σκότος); to darken, cover with darkness: Revelation 9:2 L T WH; ; metaphorically, to darken or blind the mind: σκοτώμενοι τῇ διάνοια, Ephesians 4:18 L T Tr WH. ((Sophocles), Plato, Polybius, Plutarch, others; the Sept..)

Topical Lexicon
The Motif of Darkness in Scripture

From Genesis 1:2 to Revelation 22:5, darkness functions as more than absence of light; it is a spiritual and eschatological symbol of separation from God. The verb behind Strong’s Greek 4656 consistently intensifies that imagery, portraying an active state in which light is withheld or removed.

Occurrences in the New Testament

1. Revelation 9:2 – Cosmic disturbance: “the sun and the air were darkened by the smoke from the shaft.” Here the verb underscores the terror unleashed when demonic forces erupt from the Abyss, previewing the ultimate futility of creation apart from its Creator.
2. Ephesians 4:18 – Moral-intellectual corruption: “They are darkened in their understanding and alienated from the life of God.” The perfect participle pictures a settled condition of blindness that locks the unregenerate mind in ignorance.
3. Revelation 16:10 – Judicial plague: “its kingdom was plunged into darkness.” The fifth bowl turns the beast’s realm into palpable gloom, anticipating the “outer darkness” of final judgment (Matthew 25:30).

Old Testament Echoes and Jewish Background

Ancient readers would recall the ninth plague on Egypt (Exodus 10:21-23) and prophetic oracles where the day of the Lord is a day of “thick darkness” (Joel 2:2; Amos 5:18). Second-Temple literature reflects the same polarity: righteousness belongs to “sons of light,” wickedness to “sons of darkness” (cf. Dead Sea Scrolls, 1QM).

Theological Implications

• Sin obscures spiritual perception. The darkness that cloaks the mind (Ephesians 4:18) is not intellectual deficiency alone but a volitional rebellion that rejects revealed truth.
• Judgment is both present and future. Revelation demonstrates how God may permit temporary darkness as a precursor to ultimate condemnation, yet such acts also call the world to repentance.
• Contrast underlines grace. When “the god of this age has blinded the minds of unbelievers” (2 Corinthians 4:4), God “who said, ‘Let light shine out of darkness,’ made His light shine in our hearts” (2 Corinthians 4:6).

Christ, the Light Who Dispels Darkness

Jesus declares, “I am the Light of the world. Whoever follows Me will never walk in the darkness, but will have the light of life” (John 8:12). His incarnation, death, and resurrection break the power of both moral blindness and eschatological gloom. The cross itself was shrouded in midday darkness (Matthew 27:45), signaling that He bore the judicial darkness His people deserved.

Pastoral and Missional Applications

• Proclamation must address the heart, not merely the intellect, because darkness is fundamentally spiritual.
• Intercessory prayer is vital; only divine illumination can overturn the blindness described in Ephesians 4:18.
• The church’s witness shines brightest when lived holiness contrasts the surrounding moral night (Philippians 2:15).

Summary

Strong’s Greek 4656 depicts darkness that is initiated or permitted by God as judgment, or by human sin as blindness. Whether in apocalyptic turmoil or the everyday hardening of hearts, the term warns of the peril of rejecting light. Yet every occurrence drives readers to the hope that “night will be no more” (Revelation 22:5), when the Lamb Himself will be our everlasting lamp.

Forms and Transliterations
εσκοτωθη εσκοτώθη ἐσκοτώθη εσκοτώθην εσκοτώθησαν εσκοτωμενη εσκοτωμένη ἐσκοτωμένη εσκοτωμενοι ἐσκοτωμένοι εσκότωται σκοτωθείη eskotomene eskotoméne eskotōmenē eskotōménē eskotomenoi eskotoménoi eskotōmenoi eskotōménoi eskotothe eskotōthē eskotṓthe eskotṓthē
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Ephesians 4:18 V-RPM/P-NMP
GRK: ἐσκοτωμένοι τῇ διανοίᾳ
NAS: being darkened in their understanding,
INT: being darkened in the understanding

Revelation 9:2 V-AIP-3S
GRK: μεγάλης καὶ ἐσκοτώθη ὁ ἥλιος
NAS: and the air were darkened by the smoke
INT: great and was darkened the sun

Revelation 16:10 V-RPM/P-NFS
GRK: βασιλεία αὐτοῦ ἐσκοτωμένη καὶ ἐμασῶντο
NAS: became darkened; and they gnawed
KJV: was full of darkness; and
INT: kingdom of it darkened and they were gnawing

Strong's Greek 4656
3 Occurrences


ἐσκοτωμένη — 1 Occ.
ἐσκοτωμένοι — 1 Occ.
ἐσκοτώθη — 1 Occ.

4655
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