3392. miainó
Lexical Summary
miainó: To stain, defile, pollute

Original Word: μιαίνω
Part of Speech: Verb
Transliteration: miainó
Pronunciation: mee-ah'-ee-no
Phonetic Spelling: (me-ah'-ee-no)
KJV: defile
NASB: defiled, defile
Word Origin: [perhaps a primary verb]

1. to sully or taint, i.e. contaminate (ceremonially or morally)

Strong's Exhaustive Concordance
defile.

Perhaps a primary verb; to sully or taint, i.e. Contaminate (ceremonially or morally) -- defile.

HELPS Word-studies

3392 miaínō – properly, to stain (with paint or dye); (figuratively) to stain (defile) the soul, i.e. like when sin taints by its polluting effects ("moral, spiritual stains").

The root mia- ("tainted at the source") shows everything passing through it also becomes stained ("reconstituted," polluted).

[3392 (miaínō) literally means "to dye, stain with color." Figuratively, it refers to rendering something morally (spiritually) defiled.]

NAS Exhaustive Concordance
Word Origin
a prim. verb
Definition
to stain, defile
NASB Translation
defile (1), defiled (4).

Thayer's Greek Lexicon
STRONGS NT 3392: μιαίνω

μιαίνω; passive, 1 aorist subjunctive 3 person plural μιανθῶσιν; perfect 3 person singular μεμίανται (unless it be better to take this form as a plural; cf. Krüger, § 33, 3 Anm. 9; Alexander Buttmann (1873) Gram. § 101 Anm. 7; Ausf. Spr. § 101 Anm. 13; Buttmann, 41 (36); (Winer's Grammar, § 58, 6 b. β.)), participle μεμιασμενος (Titus 1:15 R G) and μειαμμενος (ibid. L T Tr WH; also Wis. 7:25; Tobit 2:9; Josephus, b. j. 4, 5, 2 edition, Bekker; cf. Matthiae, i., p. 415; Krüger, § 40, under the word; Lob. ad Phryn., p. 35; Otto on Theophil. ad Autol. 1, 1, p. 2f; (Veitch, under the word)); from Homer down;

1. to dye with another color, to stain: ἐλέφαντα φοίνικι, Homer Iliad 4, 141.

2. to defile, pollute, sully, contaminate, soil (the Sept. often for טִמֵּא): in a physical and a moral sense, σάρκα (of licentiousness), Jude 1:8; in a moral sense, τόν συνείδησιν, τόν νοῦν, passive Titus 1:15; absolutely, to defile with sin, passive ibid. and in Hebrews 12:15; for הֶחֱטִיא, Deuteronomy 24:6(4); in a ritual sense, of men, passive John 18:28 (Leviticus 22:5, 8; Numbers 19:13, 20; Tobit 2:9). [SYNONYMS: μιαίνω, μολύνω: according to Trench (N. T. Synonyms, § xxxi.) μιαίνω to stain differs from μολύνω to smear not only in its primary and outward sense, but in the circumstance that (like English stain) it may be used in good part, while μολύνω admits of no worthy reference.]

Topical Lexicon
Overview

Strong’s Greek 3392 focuses on the idea of pollution or defilement—an uncleanness that is moral, spiritual, or ceremonial. In Scripture it is never a mere external blemish; it points to a condition that renders a person, community, or action unacceptable before the holy presence of God.

Occurrences in the New Testament

John 18:28

The chief priests “did not enter the Praetorium, so that they would not be defiled, but could eat the Passover”. Here the verb highlights the irony of men scrupulous about ritual purity while conspiring to condemn the sinless Lamb of God. Their concern underscores how easily external religion can mask inner corruption.

Titus 1:15 (twice)

Paul warns that “to the pure, all things are pure, but to the defiled and unbelieving, nothing is pure; in fact, both their mind and conscience are defiled”. The first occurrence describes those whose hearts are already stained; the second shows the ongoing condition of corruption. False teachers turn dietary scruples into legalistic bondage yet remain inwardly polluted. The true issue is not the object touched but the heart within.

Hebrews 12:15

Believers are urged to watch “that no root of bitterness springs up to cause trouble and defile many”. Defilement here spreads like contamination through the body of Christ when unresolved resentment is tolerated. The text places communal holiness at risk, showing that sin in one member can infect the whole fellowship.

Jude 1:8

Certain dreamers “defile the flesh, reject authority, and slander glorious beings”. Their libertine lifestyles pollute both body and community, linking moral impurity with doctrinal rebellion and irreverence toward the spiritual realm.

Old Testament Background

Leviticus repeatedly distinguishes the holy from the unclean. Contact with death, disease, or idolatry barred worshipers from sanctuary access until cleansing rites restored them. The Septuagint often uses forms of this same verb to translate such pollution (for example, Leviticus 18:24). The New Testament writers draw on that background, but they shift the emphasis from ceremonial to moral and spiritual truth fulfilled in Christ.

Theological Themes

1. Holiness of God: Defilement underscores the absolute separation between God’s purity and human sin.
2. Internal versus External: True purity originates in a renewed heart. External observances cannot compensate for inward corruption.
3. Community Contagion: Sin rarely stays private; like leaven, it permeates relationships and assemblies.
4. Redemptive Cleansing: The blood of Jesus Christ cleanses from all sin (1 John 1:7). What is defiled can be made holy through faith and repentance.

Practical Ministry Applications

• Guarding Doctrine: Titus shows that distorted teaching defiles conscience. Sound doctrine is vital to moral purity.
• Church Discipline: Hebrews and Jude call leaders to address grievances and immorality before they spread.
• Personal Holiness: Believers must examine motives, not merely actions, lest hidden attitudes render service unacceptable.
• Evangelism and Pastoral Care: Understanding defilement equips ministers to proclaim Christ’s cleansing to those burdened by guilt or ritualistic religion.

Related Concepts

– Purity of Heart (Matthew 5:8)

– Conscience Cleansed by Christ (Hebrews 9:14)

– Separating from Worldly Pollution (2 Corinthians 7:1)

The five New Testament uses of Strong’s 3392 thus provide a concise yet profound testimony: only through the sanctifying work of the Lord Jesus Christ can defiled minds, consciences, and communities be made pure, empowering believers to “serve the living God” in holiness and truth.

Forms and Transliterations
εμίαινεν εμιαίνεσθε εμιαίνετο εμίαινον εμιαίνου εμίανα εμίαναν εμίανας εμιάνατε εμίανε εμίανεν εμιάνθη εμιάνθησαν μεμιαμμενοις μεμιαμμένοις μεμίανσαι μεμιανται μεμίανται μεμιασμένη μεμιασμένος μιαίνειν μιαίνεσθε μιαινομένη μιαίνουσι μιαινουσιν μιαίνουσιν μιαίνωνται μιάναι μιάνατε μιανεί μιανείτε μιανή μιάνη μιάνης μιανθή μιανθήναι μιανθήσεσθε μιανθήσεται μιανθήσονται μιανθώσι μιανθωσιν μιανθῶσιν μιανούσι μιάνσει μιανώ memiammenois memiamménois memiantai memíantai miainousin miaínousin mianthosin mianthôsin mianthōsin mianthō̂sin
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Englishman's Concordance
John 18:28 V-ASP-3P
GRK: ἵνα μὴ μιανθῶσιν ἀλλὰ φάγωσιν
NAS: so that they would not be defiled, but might eat
KJV: lest they should be defiled; but
INT: that not they might be stained but they might eat

Titus 1:15 V-RPM/P-DMP
GRK: τοῖς δὲ μεμιαμμένοις καὶ ἀπίστοις
NAS: but to those who are defiled and unbelieving,
KJV: but unto them that are defiled and
INT: to those who however are defiled and unbelieving

Titus 1:15 V-RIM/P-3S
GRK: καθαρόν ἀλλὰ μεμίανται αὐτῶν καὶ
NAS: and their conscience are defiled.
KJV: and conscience is defiled.
INT: [is] pure but are defiled of them both

Hebrews 12:15 V-ASP-3P
GRK: δι' αὐτῆς μιανθῶσιν οἱ πολλοί
NAS: and by it many be defiled;
KJV: thereby many be defiled;
INT: by this be defiled the many

Jude 1:8 V-PIA-3P
GRK: σάρκα μὲν μιαίνουσιν κυριότητα δὲ
NAS: by dreaming, defile the flesh,
KJV: [filthy] dreamers defile the flesh,
INT: [the] flesh indeed defile authority moreover

Strong's Greek 3392
5 Occurrences


μεμιαμμένοις — 1 Occ.
μεμίανται — 1 Occ.
μιαίνουσιν — 1 Occ.
μιανθῶσιν — 2 Occ.

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