1301. diatéreó
Lexical Summary
diatéreó: To keep, to preserve, to maintain

Original Word: διατηρέω
Part of Speech: Verb
Transliteration: diatéreó
Pronunciation: dee-at-ay-reh'-o
Phonetic Spelling: (dee-at-ay-reh'-o)
KJV: keep
NASB: keep free, treasured
Word Origin: [from G1223 (διά - through) and G5083 (τηρέω - keep)]

1. to watch thoroughly
2. (positively and transitively) to observe strictly
3. (negatively and reflexively) to avoid wholly

Strong's Exhaustive Concordance
keep.

From dia and tereo; to watch thoroughly, i.e. (positively and transitively) to observe strictly, or (negatively and reflexively) to avoid wholly -- keep.

see GREEK dia

see GREEK tereo

HELPS Word-studies

1301 diatēréō (from 1223 /diá, "through, thoroughly," intensifying 5083 /tēréō, "guard") – properly, thoroughly keep (very carefully) to ensure final safety (staying intact for "successful final delivery").

NAS Exhaustive Concordance
Word Origin
from dia and téreó
Definition
to keep carefully
NASB Translation
keep...free (1), treasured (1).

Thayer's Greek Lexicon
STRONGS NT 1301: διατηρέω

διατηρέω, διατήρω; 3 person singular imperfect διετήρει; to keep continually or carefully (see διά, C. 2): Luke 2:51 (Genesis 37:11); ἐμαυτόν ἐκ τίνος (cf. τηρεῖν ἐκ τίνος, John 17:15), to keep oneself (pure) from a thing, Acts 15:29; ἀπό τίνος for שָׁמַר followed by מִן, Psalm 11:8 (). (Plato, Demosthenes, Polybius, others.)

Topical Lexicon
Root Meaning and Semantic Range

The verb describes deliberate, attentive preservation—guarding something so that it remains intact, unaltered, and ready for future use.

Occurrences in Scripture

Luke 2:51; Acts 15:29.

Contextual Significance in Luke 2:51

After the twelve-year-old Jesus confounds the teachers in the temple, “His mother kept all these things in her heart”. Mary is portrayed as the faithful steward of revelation. Her meditation parallels Psalm 119:11 and shows how hidden truth matures into obedient action (cf. John 2:5; 19:25-27).

Contextual Significance in Acts 15:29

The Jerusalem Council writes, “You will do well if you keep yourselves from these things.” The Gentile believers are to guard their new freedom by avoiding idolatry and immorality, thereby protecting unity with Jewish brethren and upholding the holiness of the gospel (Leviticus 17–18 echoes).

Theological Implications

1. Revelation entrusted must be protected (Luke 2:51; Jude 3).
2. Obedience is a stewardship, not mere compliance (Acts 15:29; 2 Timothy 1:14).
3. Internal preservation of truth fuels external faithfulness, linking doctrine and life.

Connection with Old Testament Concepts

Cognate verbs in the Septuagint are used for covenant-keeping (Genesis 17:9; Deuteronomy 4:2). The New Testament extends this covenant-guarding motif to the messianic community, now empowered by the Spirit.

Practical Application for Ministry

• Cultivate habits of Scriptural meditation and journaling after Mary’s model.
• Teach converts that grace includes the call to guard moral purity and doctrinal clarity.
• Promote cultural sensitivity by urging voluntary restraints that preserve fellowship (cf. 1 Corinthians 8:13).

Observations for Exposition and Teaching

• Imperfect tense in Luke 2:51 shows continuous action—Mary kept on pondering.
• Present participle in Acts 15:29 links diligent guarding with spiritual well-being.
• Both texts place the verb within relational settings: family devotion and church unity.

Conclusion

Strong’s Greek 1301 highlights the believer’s responsibility to safeguard both revelation and conduct, ensuring that the gospel remains undefiled and fruitful in every generation.

Forms and Transliterations
διατετηρημένον διατηρεί διατηρείν διατηρήσεις διατηρήσετε διατήρησιν διατήρησόν διατηρουντες διατηρούντες διατηροῦντες διατηρούσιν διατηρών διετηρει διετήρει διετηρήθης διετήρησε διετηρούντο diaterountes diateroûntes diatērountes diatēroûntes dieterei dietērei dietḗrei
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Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Luke 2:51 V-IIA-3S
GRK: μήτηρ αὐτοῦ διετήρει πάντα τὰ
NAS: to them; and His mother treasured all
KJV: his mother kept all these
INT: mother of him treasured up all these

Acts 15:29 V-PPA-NMP
GRK: ἐξ ὧν διατηροῦντες ἑαυτοὺς εὖ
NAS: and from fornication; if you keep yourselves
KJV: which if ye keep yourselves,
INT: from which keeping yourselves well

Strong's Greek 1301
2 Occurrences


διατηροῦντες — 1 Occ.
διετήρει — 1 Occ.

1300
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