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Greek verb · G3431

μοιχεύω

moicheuomoy-khyoo'-o

to commit adultery

14 uses in the Greek text, one for each word STEP Bible has tagged with this key

Concordance spelling: moicheúō

Word page · Part of the concordance, one page for every word of the Hebrew and Greek text. Strong's G3431is this word's number in James Strong's 1890 index of the King James Bible.

  • 6 of 27
    New Testament books
  • 9
    spellings

The definition in full

Strong's key (1890) · G3431

to commit adultery

The King James renders it: commit adultery.

James Strong, The Exhaustive Concordance of the Bible (1890), public domain. Strong indexed the King James text, and this site quotes his entry as that index.

Summary

moicheuo is rendered "to commit adultery". It stands 14 times in the Greek text, across six books.

  • Four of the uses stand in Matthew, more than in any other book.
  • Its first use in canonical order opens the ledger below.Matthew 5:27You have heard that it was said, ‘Do not commit adultery.’
  • The Greek text spells it nine different ways.

The first use

You have heard that it was said, ‘Do not commit adultery.’

Matthew 5:27μοιχεύσεις

The first use, in the order of the New Testament's books.

Where the word stands

Four of the word's fourteen uses are in Matthew.

The other 21 New Testament books never use the word.

What the word means

Each meaning, and the words it is translated by

How the Greek text is glossed, word by word

  • commits adultery2
  • shall you commit adultery2
  • committing adultery1
  • do you commit adultery1
  • has committed adultery with1
  • to be adulterated1
  • to commit adultery1
  • will you commit adultery1
  • will you commit adultery.’1
  • you do commit adultery1
  • you may commit adultery1
  • you will commit adultery1

The words built on the same word-part

Each word below begins with the same letters this one begins with. A shared word-part shows a family. It does not settle what any one of them means, so each word carries its own uses on its own page. Scholars call that shared part the stem.

μοιχαλίςmoichalisadulterousUses7
μοιχάωmoichaoto commit adulteryUses4
μοιχόςmoichosadultererUses3
μοιχείαmoicheiaadulteryUses2

All 14, in canonical order

Every use, in order

Every use, grouped by book, with its verse.

9 spellings and their grammar

STEP Bible tags every word of the Hebrew and Greek text with its spelling and its grammar. Both lists below count the rows printed underneath, written out in English, with the code beside each one as it was tagged.

How it is spelled

  • μοιχεύσεις3
  • μοιχεύσῃς3
  • μοιχεύεις2
  • ἐμοίχευσεν1
  • μοιχεύει1
  • μοιχεύει.¶1
  • μοιχεύειν1
  • μοιχευθῆναι1
  • μοιχεύοντας1

The grammar of each form

  • verb · aorist active, subjunctive · 2nd person singular3V-AAS-2S
  • verb · future active, indicative · 2nd person singular3V-FAI-2S
  • verb · present active, indicative · 2nd person singular2V-PAI-2S
  • verb · present active, indicative · 3rd person singular2V-PAI-3S
  • verb · aorist active, indicative · 3rd person singular1V-AAI-3S
  • verb · aorist passive, infinitive (“to…”)1V-APN
  • verb · present active, infinitive (“to…”)1V-PAN
  • verb · present active, participle · accusative (object) · masculine plural1V-PAP-APM

Matthew

four uses
  • You have heard that it was said, ‘Do not commit adultery.’

    Matthew 5:27

    • μοιχεύσειςmoicheuseisverb · future active, indicative · 2nd person singulartagged: will you commit adultery.’
  • But I tell you that anyone who looks at a woman to lust after her has already committed adultery with her in his heart.

    Matthew 5:28

    • ἐμοίχευσενemoicheusenverb · aorist active, indicative · 3rd person singulartagged: has committed adultery with
  • But I tell you that anyone who divorces his wife, except for sexual immorality, brings adultery upon her. And he who marries a divorced woman commits adultery.

    Matthew 5:32

    • μοιχευθῆναιmoicheuthenaiverb · aorist passive, infinitive (“to…”)tagged: to be adulterated
  • “Which ones?” the man asked. Jesus answered, “‘Do not murder, do not commit adultery, do not steal, do not bear false witness,

    Matthew 19:18

    • μοιχεύσειςmoicheuseisverb · future active, indicative · 2nd person singulartagged: will you commit adultery

Mark

one use
  • You know the commandments: ‘Do not murder, do not commit adultery, do not steal, do not bear false witness, do not cheat others, honor your father and mother.’”

    Mark 10:19

    • μοιχεύσῃςmoicheusesverb · aorist active, subjunctive · 2nd person singulartagged: shall you commit adultery

Luke

three uses
  • Anyone who divorces his wife and marries another woman commits adultery, and he who marries a divorced woman commits adultery.

    Luke 16:18

    • μοιχεύειmoicheueiverb · present active, indicative · 3rd person singulartagged: commits adultery
    • μοιχεύει.¶moicheueiverb · present active, indicative · 3rd person singulartagged: commits adultery
  • You know the commandments: ‘Do not commit adultery, do not murder, do not steal, do not bear false witness, honor your father and mother.’”

    Luke 18:20

    • μοιχεύσῃςmoicheusesverb · aorist active, subjunctive · 2nd person singulartagged: shall you commit adultery

Romans

three uses
  • You who forbid adultery, do you commit adultery? You who abhor idols, do you rob temples?

    Romans 2:22

    • μοιχεύεινmoicheueinverb · present active, infinitive (“to…”)tagged: to commit adultery
    • μοιχεύειςmoicheueisverb · present active, indicative · 2nd person singulartagged: do you commit adultery
  • The commandments “Do not commit adultery,” “Do not murder,” “Do not steal,” “Do not covet,” and any other commandments, are summed up in this one decree: “Love your neighbor as yourself.”

    Romans 13:9

    • μοιχεύσειςmoicheuseisverb · future active, indicative · 2nd person singulartagged: you will commit adultery

James

two uses
  • For He who said, “Do not commit adultery,” also said, “Do not murder.” If you do not commit adultery, but do commit murder, you have become a lawbreaker.

    James 2:11

    • μοιχεύσῃςmoicheusesverb · aorist active, subjunctive · 2nd person singulartagged: you may commit adultery
    • μοιχεύειςmoicheueisverb · present active, indicative · 2nd person singulartagged: you do commit adultery

Revelation

one use
  • Behold, I will cast her onto a bed of sickness, and those who commit adultery with her will suffer great tribulation unless they repent of her deeds.

    Revelation 2:22

    • μοιχεύονταςmoicheuontasverb · present active, participle · accusative (object) · masculine pluraltagged: committing adultery

Where it leads

How the numbers are counted

Every count on this page comes from STEP Bible's tagged Hebrew and Greek text, the same text the ledger prints. A use is counted once each time the tagging marks a word with this key.

Spellings are counted as the Greek text spells them, with the sentence's own punctuation taken off the word first, so a form that ends a clause is not counted as a second spelling.

The family is read from the lexicon by the stem the two words share, with the accents off, and a person or a place named on the stem is left out.

Hebrew and Greek text, word tagging and grammar: STEP Bible (www.STEPBible.org), Tyndale House, CC BY 4.0. Their grammar codes are written out in English here and shown as tagged beside each one.

Meaning and senses: STEP Bible TBESG (Tyndale House, CC BY 4.0), the Brief lexicon based on Abbott-Smith (1922).

Dictionary key: Strong's Exhaustive Concordance of the Bible (1890, public domain). English verse text: Berean Standard Bible (public domain, 2023).

Revised 2026-09-05. Every cited work, the sources registry →