3432. moichos
Lexical Summary
moichos: Adulterer

Original Word: μοιχός
Part of Speech: Noun, Masculine
Transliteration: moichos
Pronunciation: moy-khos'
Phonetic Spelling: (moy-khos')
KJV: adulterer
NASB: adulterers
Word Origin: [perhaps a primary word]

1. a (male) adulterer
2. (figuratively) apostate

Strong's Exhaustive Concordance
adulterer.

Perhaps a primary word; a (male) paramour; figuratively, apostate -- adulterer.

NAS Exhaustive Concordance
Word Origin
a prim. word
Definition
an adulterer
NASB Translation
adulterers (3).

Thayer's Greek Lexicon
STRONGS NT 3432: μοιχός

μοιχός, μοιχοῦ, , an adulterer: Luke 18:11; 1 Corinthians 6:9; Hebrews 13:4. Hebraistically (see μοιχαλίς, b.) and figuratively, faithless toward God, ungodly: James 4:4 R G. (Sophocles, Aristophanes, Xenophon, Plutarch, and following; the Sept..)

Topical Lexicon
Definition and Conceptual Scope

μοιχός designates a person—typically male—who violates the exclusivity of the marriage covenant by engaging in sexual relations with someone else’s spouse. Rooted in the seventh commandment of Exodus 20:14, the term evokes legal, moral, covenantal, and relational dimensions rather than merely sexual misconduct.

Occurrences in the New Testament

The noun appears three times:

Luke 18:11—The self-righteous Pharisee thanks God that he is “not like other men—swindlers, evildoers, adulterers.”
1 Corinthians 6:9—Paul warns that “neither the sexually immoral nor idolaters nor adulterers” will inherit the kingdom of God.
Hebrews 13:4—The writer affirms, “Marriage should be honored by all and the marriage bed kept undefiled, for God will judge the sexually immoral and adulterers.”

While the contexts differ—self-justification, eschatological warning, and pastoral exhortation—the indictment of adultery remains uncompromising.

Old Testament and Jewish Background

In Mosaic Law adultery was a capital offense (Leviticus 20:10; Deuteronomy 22:22), stressing the sanctity of marriage as a covenantal microcosm of Israel’s relationship with the LORD. Prophets often used adultery metaphorically for idolatry (Jeremiah 3:8-9; Ezekiel 16:32). Second Temple Judaism continued to regard adultery as both sin and social crime, carrying severe stigma.

New Testament Theology

1. Covenant Integrity: Hebrews 13:4 roots marital faithfulness in God’s ongoing judgment, underscoring marriage as His institution.
2. Kingdom Ethics: In 1 Corinthians 6:9 adultery belongs to a list of behaviors incompatible with kingdom inheritance, showing that salvation’s grace transforms moral practice.
3. Heart Orientation: Though moichos is absent from the Sermon on the Mount, Matthew 5:27-28 intensifies the command by tracing adultery to lustful intent, reinforcing that external acts flow from internal dispositions.

Christological Significance

Jesus fulfills the law not only by avoiding adultery but by embodying covenant loyalty. His union with the Church is portrayed as the flawless marriage (Ephesians 5:25-32). By contrast, the adulterer images covenant breach; thus the term illuminates the purity of Christ’s faithfulness.

Ecclesiological Implications

Church discipline addresses unrepentant adultery (Matthew 18:15-17; 1 Corinthians 5:11), aiming to protect the flock and restore the sinner. Marriage, upheld in Hebrews 13:4, serves as a testimony to the gospel; therefore clergy qualification lists require marital faithfulness (1 Timothy 3:2, 12; Titus 1:6).

Pastoral and Ethical Applications

• Guarding the Heart: Believers cultivate purity by renewing the mind (Romans 12:2) and fleeing sexual immorality (1 Corinthians 6:18).
• Honoring Marriage: Couples are exhorted to mutual fidelity, forgiveness, and covenant commitment, reflecting Christ and the Church.
• Gospel Hope: 1 Corinthians 6:11 follows the warning with “And that is what some of you were. But you were washed…” offering cleansing for repentant adulterers.

Eschatological Warning and Promise

Revelation’s catalogs of the judged include “sexually immoral persons” (Revelation 21:8; 22:15), echoing 1 Corinthians 6:9. Yet the New Jerusalem is described as a Bride prepared for her Husband (Revelation 21:2), assuring that redeemed humanity will enjoy an unbreakable covenant.

Summary

μοιχός exposes the gravity of adultery as covenant violation, threatens divine judgment, and calls the Church to holiness. By highlighting God’s unwavering standard and providing a path of grace-empowered repentance, Scripture transforms former adulterers into faithful disciples who magnify the fidelity of Christ.

Forms and Transliterations
μοιχοι μοιχοί μοιχοὶ μοιχός μοιχού μοιχους μοιχούς μοιχοὺς μοιχών μόλιβδον μόλιβδος μολίβδου μολίβδω moichoi moichoí moichoì moichous moichoùs
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Luke 18:11 N-NMP
GRK: ἅρπαγες ἄδικοι μοιχοί ἢ καὶ
NAS: swindlers, unjust, adulterers, or even
KJV: unjust, adulterers, or
INT: swindlers unrighteous adulterers or even

1 Corinthians 6:9 N-NMP
GRK: εἰδωλολάτραι οὔτε μοιχοὶ οὔτε μαλακοὶ
NAS: nor adulterers, nor
KJV: nor adulterers, nor
INT: idolaters nor adulterers nor effeminate

Hebrews 13:4 N-AMP
GRK: γὰρ καὶ μοιχοὺς κρινεῖ ὁ
NAS: for fornicators and adulterers God
KJV: and adulterers God
INT: however and adulterers will judge

Strong's Greek 3432
3 Occurrences


μοιχοί — 2 Occ.
μοιχοὺς — 1 Occ.

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