How to Pronounce Μοιχεία
The Greek word μοιχεία is commonly transliterated into English as moicheia.
A simple English pronunciation guide would be: moy-KHEE-ah.
You can also hear it pronounced through standard lexicon tools here: Blue Letter Bible pronunciation / lexicon entry.
Here is a tight but in-depth study of μοιχεία (moicheia) in the context of my broader framework.
In my recent material, adultery is the clearest explicit covenant-theft category and the main violation of an existing marital or headship claim, rather than a blanket synonym for all sexual sin. In that framework, adultery is not just impurity in the abstract. It is trespass. It is intrusion into an already claimed field.
Core Lexical Sense
The Greek noun μοιχεία means adultery, that is, the violation of the marriage covenant by illicit sexual union. It belongs to a family of related words such as μοιχεύω (to commit adultery), μοιχός (adulterer), and μοιχαλίς (adulteress).
Important Textual Note
Strictly speaking, the noun μοιχεία appears in the New Testament tradition in the following places:
- Matthew 15:19
- Mark 7:21
- John 8:3
- Galatians 5:19 in the Textus Receptus / KJV tradition, though many modern critical editions omit it there as a textual variant
Also worth noting: some passages strongly relevant to adultery use cognate verbal forms rather than the noun itself. For example, Romans 13:9 invokes the command, “You shall not commit adultery,” but does not use the noun μοιχεία.
Every New Testament Usage of Μοιχεία
1) Matthew 15:19
Text: “For out of the heart come evil thoughts, murders, adulteries, fornications...”
Greek form: μοιχεῖαι (plural)
Function: Jesus places adultery among heart-generated defilements. The issue is not merely outward ritual contamination but interior corruption that breaks out into action.
Old Testament quote or in scope? Not a direct quotation, but clearly in scope.
Relevant Old Testament background:
- Exodus 20:14 — “You shall not commit adultery”
- Deuteronomy 5:18 — repetition of the same command
Why it matters: Matthew 15:19 does not broaden adultery into all sexual sin. It keeps adultery as one specific category among several distinct categories.
2) Mark 7:21
Text: “For from within, out of the heart of men, come evil thoughts, fornications, thefts, murders, adulteries...”
Greek form: μοιχεῖαι (plural)
Function: Same broad idea as Matthew 15:19, but especially important because πορνεῖαι and μοιχεῖαι are listed separately, side by side.
Old Testament quote or in scope? Not a direct quotation, but strongly in scope.
Relevant Old Testament background:
- Exodus 20:14
- Deuteronomy 5:18
Why it matters: This is one of the strongest passages for distinguishing adultery from broader sexual corruption. Jesus does not collapse πορνεία into μοιχεία. He names both.
3) John 8:3
Text: “The scribes and Pharisees brought a woman caught in adultery...”
Greek form: μοιχείᾳ
Function: Narrative use. The woman is presented as one allegedly taken in the act of adultery.
Old Testament quote or in scope? Yes, explicitly in scope.
Relevant Old Testament background:
- Leviticus 20:10
- Deuteronomy 22:22–24
Why it matters: This is the clearest narrative example of adultery functioning as a Torah-defined legal offense, not merely a vague moral idea. It is also worth remembering that the accusers in the story only bring the woman, even though the Torah’s own legal pattern implicates both parties.
Text-critical note: Many modern Bibles bracket John 7:53–8:11 and note that the earliest manuscripts do not include the passage. Even so, in the traditional text this remains one of the clearest noun usages.
4) Galatians 5:19 (Textual Variant)
Text in the TR / KJV tradition: “Now the works of the flesh are manifest, which are these; adultery, fornication, uncleanness...”
Greek form: μοιχεία
Function: In the Textus Receptus / KJV tradition, adultery appears in the vice list. Many modern critical editions omit it here as a later addition.
Old Testament quote or in scope? Not a direct quotation, but in scope through the seventh commandment and the wider sexual laws of Torah.
Relevant Old Testament background:
- Exodus 20:14
- Deuteronomy 5:18
- Leviticus 18
- Leviticus 20
Why it matters: For readers working in the TR / KJV tradition, this provides another noun occurrence. For strict critical-text work, it is better treated as disputed evidence rather than a fixed occurrence.
What the Usage Pattern Suggests
Across the New Testament tradition, μοιχεία is consistently tied to the violation of an existing marital or covenantal claim. It is not simply a catch-all term for every possible sexual irregularity.
The strongest observations are these:
- Jesus distinguishes μοιχεία from πορνεία in Mark 7:21.
- The New Testament’s adultery language remains anchored in the seventh commandment.
- John 8 places adultery under the legal scope of Leviticus and Deuteronomy.
That makes adultery a narrower and more specific category than broader sexual disorder. In covenantal terms, it is not generic sexual wrongdoing. It is covenant trespass.
Why This Matters in My Broader Framework
In my own framework, μοιχεία is best understood as the sexual sin of trespassing an already-covered field. It is the violation of a living covenantal order. It is a breach of a headship claim that already exists.
That is why adultery functions differently from broader categories like πορνεία. The distinction matters. Scripture preserves separate moral and legal categories rather than flattening them all into one word.
So the lexical force of μοιχεία supports a broader thesis: not every sexual sin is identical in class. Adultery is the specific offense of violating an established covenant boundary.
Summary
- Μοιχεία means adultery, not generic sexual sin.
- Its New Testament noun occurrences are limited and consistent.
- Each occurrence is either directly tethered to or clearly framed by the Old Testament’s covenantal law.
- The usage pattern supports a distinction between adultery proper and broader sexual corruption.
- In covenantal terms, adultery is best read as trespass against an existing marital/headship claim.