2045. ereunaó
Lexical Summary
ereunaó: To search, examine, investigate

Original Word: ἐρευνάω
Part of Speech: Verb
Transliteration: ereunaó
Pronunciation: eh-ryoo-nah'-o
Phonetic Spelling: (er-yoo-nah'-o)
KJV: search
NASB: searches, search, seeking to know
Word Origin: [apparently from G2046 (ἐρέω - To say) (through the idea of inquiry)]

1. to seek
2. (figuratively) to investigate

Strong's Exhaustive Concordance
search.

Apparently from ereo (through the idea of inquiry); to seek, i.e. (figuratively) to investigate -- search.

see GREEK ereo

NAS Exhaustive Concordance
Word Origin
variant reading for eraunaó, q.v.
NASB Translation
search (2), searches (3), seeking to know (1).

Thayer's Greek Lexicon
STRONGS NT 2045: ἐρευνάω

ἐρευνάω, ἐρεύνω; 1 aorist imperative ἐρεύνησον; ( ἐρευνᾷ a search); from Homer down; to search, examine into: absolutely, John 7:52; τί, John 5:39; Romans 8:27; 1 Corinthians 2:10; Revelation 2:23 with which passage cf. Jeremiah 11:20; Jeremiah 17:10; Jeremiah 20:12; followed by an indirect question, 1 Peter 1:11 (2 Samuel 10:3; Proverbs 20:27). The form ἐραυνάω (which see in its place) T Tr WH have received everywhere into the text, but Lachmann only in Revelation 2:23. (Compare: ἐξερευνάω.)

Topical Lexicon
Essence of ἐραυνάω

The verb points to careful, penetrating inquiry—never a casual glance. It pictures someone moving from surface to depth, separating truth from appearance until the matter under review is fully laid bare. In Scripture the activity is applied both to human seekers (probing God’s Word or historical facts) and to God Himself (probing the recesses of the human heart).

Canonical Distribution

1 Corinthians 2:10

John 5:39

John 7:52

Romans 8:27

Revelation 2:23

1 Peter 1:11

Together these six occurrences span Gospel narrative, Pauline theology, Petrine reflection, apocalyptic admonition, and a direct saying of Jesus—demonstrating a unified biblical call to deep examination in every era of redemptive history.

Human Searching of Divine Revelation

John 5:39 presents the most explicit summons: “You search the Scriptures because you think that in them you have eternal life; and these are the very Scriptures that testify about Me”. The Lord affirms rigorous study yet rebukes any approach that misses Him as the hermeneutical center. Likewise, 1 Peter 1:10-11 depicts Old Testament prophets “searching and enquiring carefully” concerning the grace that was to come. Their Spirit-led investigation models a posture of expectancy, humility, and Christ-focus for every student of Scripture.

Divine Searching of Human Hearts

Romans 8:27 and Revelation 2:23 shift the subject from human investigator to divine Investigator: “He who searches our hearts” and “I am He who searches minds and hearts.” The One who inspired the prophets and scriptures also examines the innermost motives of men. The Spirit’s searching “even the deep things of God” (1 Corinthians 2:10) assures believers that no aspect of divine wisdom remains inaccessible once God chooses to disclose it, yet it simultaneously reminds us that nothing in us remains concealed before Him.

Contrast Between Unbelief and Faith

In John 7:52 the religious leaders instruct Nicodemus, “Search and see that no prophet comes out of Galilee.” Their command employs the same verb but serves skepticism, not faith. The irony is profound: those urging an investigation are themselves unwilling to acknowledge the evidence that Jesus fulfills prophetic expectation. Scripture thus warns that searching must be accompanied by submission; intellectual rigor without surrendered hearts leads to blindness.

Historical-Cultural Background

By the first century the concept of “searching the Scriptures” was ingrained in Jewish piety. Rabbinic schools prized meticulous exegesis, parsing every letter for hidden meaning. Early Christians inherited this reverence but interpreted the Law, Prophets, and Writings in light of Christ’s fulfillment. The apostolic authors therefore retain the vocabulary of careful study while relocating its center from Torah-as-end to Christ-as-goal.

Theological Synthesis

• Bibliology – Scripture invites and withstands exhaustive scrutiny; genuine study uncovers a unified Christological witness.
• Pneumatology – The Spirit searches both divine depths and human hearts, bridging heaven and earth in revelatory communion.
• Christology – Jesus stands as the object, guarantor, and judge of all searching: the One testified to, the One revealing, and the One evaluating.
• Eschatology – Revelation 2:23 places the final judgment in terms of divine examination, ensuring ultimate moral accountability.

Ministry and Discipleship Applications

1. Encourage congregational Bible intake that moves beyond cursory reading to investigative meditation, always with Christ at the center.
2. Cultivate transparency in prayer, remembering that the God who “searches hearts” already knows every thought; confession and renewal flow from this awareness.
3. Train teachers to distinguish between honest inquiry and skeptical resistance, modeling the prophets’ reverent search rather than the Sanhedrin’s dismissive one.
4. Use 1 Corinthians 2:10 to assure believers that the Spirit delights to unveil truths once hidden, promoting dependence on Him rather than mere academic prowess.

Devotional Reflection

“Search me, O God, and know my heart” (echoing Psalm 139) resonates with every New Testament use of ἐραυνάω. The disciple’s life is a continual invitation for God’s searching gaze and a continual pursuit of God’s revealed truth. Where these two searches meet—divine examination and human investigation—fellowship deepens, error is exposed, and the knowledge of Christ multiplies to the glory of God.

Forms and Transliterations
εραυνα ἐραυνᾷ εραυνατε ἐραυνᾶτε εραυνησον ἐραύνησον εραυνων ἐραυνῶν εραυνωντες ἐραυνῶντες ερευνά ερευνάτε ερευνήσατε ερεύνησον ερευνήσουσι ερευνήσωσι ερευνών ερεύνων ερευνώντες ηρεύνησας ηρεύνησε ηρεύνησεν erauna eraunā̂i eraunate eraunâte erauneson eraunēson eraúneson eraúnēson eraunon eraunôn eraunōn eraunō̂n eraunontes eraunôntes eraunōntes eraunō̂ntes
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Englishman's Concordance
John 5:39 V-PIA-2P
GRK: ἐραυνᾶτε τὰς γραφάς
NAS: You search the Scriptures because
KJV: Search the scriptures; for
INT: You search the Scriptures

John 7:52 V-AMA-2S
GRK: Γαλιλαίας εἶ ἐραύνησον καὶ ἴδε
NAS: from Galilee, are you? Search, and see
KJV: of Galilee? Search, and look:
INT: Galilee are Search and look

Romans 8:27 V-PPA-NMS
GRK: ὁ δὲ ἐραυνῶν τὰς καρδίας
NAS: and He who searches the hearts knows
KJV: And he that searcheth the hearts
INT: he who moreover searches the hearts

1 Corinthians 2:10 V-PIA-3S
GRK: πνεῦμα πάντα ἐραυνᾷ καὶ τὰ
NAS: for the Spirit searches all things,
KJV: the Spirit searcheth all things,
INT: Spirit all things searches even the

1 Peter 1:11 V-PPA-NMP
GRK: ἐραυνῶντες εἰς τίνα
NAS: seeking to know what person
KJV: Searching what, or
INT: searching to who

Revelation 2:23 V-PPA-NMS
GRK: εἰμι ὁ ἐραυνῶν νεφροὺς καὶ
NAS: that I am He who searches the minds
KJV: am he which searcheth the reins and
INT: am he who searches innermost feelings and

Strong's Greek 2045
6 Occurrences


ἐραυνᾷ — 1 Occ.
ἐραυνᾶτε — 1 Occ.
ἐραύνησον — 1 Occ.
ἐραυνῶν — 2 Occ.
ἐραυνῶντες — 1 Occ.

2044
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