900. bathunó
Lexical Summary
bathunó: To deepen, to make deep

Original Word: βαθύνω
Part of Speech: Verb
Transliteration: bathunó
Pronunciation: bah-thoo'-no
Phonetic Spelling: (bath-oo'-no)
KJV: deep
NASB: deep
Word Origin: [from G901 (βαθύς - deep)]

1. to deepen

Strong's Exhaustive Concordance
deep.

From bathus; to deepen -- deep.

see GREEK bathus

NAS Exhaustive Concordance
Word Origin
from bathus
Definition
to deepen
NASB Translation
deep (1).

Thayer's Greek Lexicon
STRONGS NT 900: βαθύνω

βαθύνω: (impf ἐβαθυνον); (βαθύς); to make deep: Luke 6:48, where ἔσκαψε καί ἐβάθυνε is not used for βαθέως ἔσκαψε, but ἐβάθυνε expresses the continuation of the work (he dug and deepened i. e. went deep); cf. Winers Grammar, § 54, 5. (In Greek writings from Homer down.)

Topical Lexicon
Linguistic Background and Setting

The verb occurs once in the Greek New Testament, in Luke 6:48, describing the action of a builder who “dug down deep” before laying a foundation. First-century listeners in Galilee and Judea were familiar with the need to pierce the layer of shifting sand that lay over bedrock in the dry season. The term therefore evokes strenuous, deliberate labor and foresight.

Scriptural Usage

Luke 6:48 records Jesus’ words: “He is like a man building a house, who dug down deep and laid his foundation on the rock. When a flood came, the torrent struck that house, but could not shake it, because it was well built.”

Only Luke preserves this particular expression, sharpening the contrast between two types of hearers: those who merely listen and those who obey (Luke 6:46-49). The solitary usage intensifies its force; the action is exceptional, purposeful, and illustrates wholehearted commitment.

Metaphorical and Theological Significance

1. Depth of Obedience. The digging represents the inward work of repentance and submission that precedes visible stability (Psalm 51:6; Romans 6:17).
2. Foundation on Christ. The rock (Luke 6:48; 1 Corinthians 10:4) points to Christ Himself. Only those who penetrate beyond superficial religiosity anchor their lives in Him.
3. Testing by Flood. Scripture frequently employs waters to symbolize divine testing or judgment (Genesis 7:11; Isaiah 59:19). The unshakable house pictures believers preserved through trials because their trust is rooted in Christ (1 Peter 1:7).

Old Testament Foreshadowing

The call to “dig” beneath outward forms echoes Old Covenant admonitions:
Proverbs 2:3-5—searching for wisdom as “hidden treasure” precedes understanding the fear of the Lord.
Isaiah 51:1—“Look to the rock from which you were cut,” urging Israel to recall the solid covenant origin in Abraham’s faith.

Both texts anticipate the Messiah’s teaching that genuine security stems from covenant faith expressed in obedient action.

Historical Interpretation

Early church fathers such as Cyprian and Augustine cited Luke 6:48 when exhorting catechumens to rigorous moral formation before baptism. Medieval preachers applied the image to monastic discipline, while Reformers highlighted sola fide as the foundation, yet affirmed that saving faith produces the “digging” of repentance and holiness (James 2:17).

Practical Ministry Application

• Discipleship. Pastors invite believers to labor in Scripture, prayer, and fellowship—means by which they “dig” until they meet Christ the Rock.
• Counseling. Counselors encourage root issues to be addressed rather than surface behaviors, reflecting the depth implied by the verb.
• Missions. Church planters establish doctrinal foundations in young congregations to withstand cultural storms (Ephesians 2:20).

Comparative Cultural Context

Galilean wadis remain arid much of the year but become torrents during seasonal rains. Builders who failed to dig risked catastrophic loss. Jesus employs a common occupational reality to teach an eternal principle: long-term security demands front-loaded effort and discernment.

Summary

The single New Testament occurrence of Strong’s Greek 900 crystallizes a key discipleship motif: authentic followers of Jesus Christ exert themselves to reach the immovable foundation—His person and word—so that when inevitable trials come, their lives, families, and ministries stand firm.

Forms and Transliterations
βαθύνατε εβαθύνατε εβάθυνε εβαθυνεν ἐβάθυνεν εβαθύνθησαν ebathunen ebathynen ebáthynen
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Luke 6:48 V-AIA-3S
GRK: ἔσκαψεν καὶ ἐβάθυνεν καὶ ἔθηκεν
NAS: who dug deep and laid a foundation
KJV: and digged deep, and laid
INT: dug and deepened and laid

Strong's Greek 900
1 Occurrence


ἐβάθυνεν — 1 Occ.

899
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