1928. epidiatassomai
Lexical Summary
epidiatassomai: To add a provision, to arrange additionally, to make further arrangements.

Original Word: ἐπιδιατάσσομαι
Part of Speech: Verb
Transliteration: epidiatassomai
Pronunciation: eh-pee-dee-ah-TAS-soh-my
Phonetic Spelling: (ep-ee-dee-ah-tas'-som-ahee)
KJV: add to
NASB: adds conditions
Word Origin: [middle voice from G1909 (ἐπί - over) and G1299 (διατάσσω - directed)]

1. to appoint besides, i.e. supplement (as a codicil)

Strong's Exhaustive Concordance
add to.

Middle voice from epi and diatasso; to appoint besides, i.e. Supplement (as a codicil) -- add to.

see GREEK epi

see GREEK diatasso

NAS Exhaustive Concordance
Word Origin
from epi and diatassó
Definition
to add provisions
NASB Translation
adds conditions (1).

Thayer's Greek Lexicon
STRONGS NT 1928: ἐπιδιατάσσομαι

ἐπιδιατάσσομαι; to ordain besides, to add something to what has been ordained (cf. ἐπί, D. 4): Galatians 3:15. Not found elsewhere.

Topical Lexicon
Meaning and Context in Galatians 3:15

The verb translated “add to” (ἐπιδιατάσσεται) appears once in the New Testament, in Paul’s illustration that “Even a human covenant, once it is ratified, no one can set it aside or add to it” (Galatians 3:15). By appealing to a common legal principle of his day, Paul shows that God’s promise to Abraham is irrevocable and immune to later amendment.

Covenantal Integrity and Divine Promise

1. Human covenants could be challenged only before ratification; afterward they possessed binding force. Paul argues from the lesser to the greater: if ordinary agreements stand firm, the covenant initiated by the sovereign, truthful God is all the more unalterable (Genesis 15:17-18; Hebrews 6:17-18).
2. The Mosaic Law, given “430 years later” (Galatians 3:17), cannot introduce new terms that nullify the promise of justification by faith (Genesis 15:6; Romans 4:13-16).
3. Christ is the promised Seed (Galatians 3:16); His redemptive work fulfills, rather than revises, the Abrahamic covenant, ensuring its blessings for all who believe.

Historical Background

In first-century Greco-Roman law, a validated will or contract was secure against outside interference. Jewish practice likewise considered a sealed covenant sacred (Jeremiah 32:10-12). Paul’s readers, familiar with both systems, would readily grasp the impossibility of unauthorized additions.

Implications for the Doctrine of Justification

• Salvation is grounded in God’s prior promise, not in subsequent legal requirements (Ephesians 2:8-9).
• Any attempt to supplement the gospel with human works repeats the very “adding” Paul denies (Galatians 1:6-9; Philippians 3:9).
• The permanence of God’s covenant grounds the believer’s assurance: “The gifts and the calling of God are irrevocable” (Romans 11:29).

Connections with Other Covenant Passages

Genesis 17:7 – The everlasting nature of the covenant with Abraham.

Jeremiah 31:31-34 – Promise of a new covenant, not a modification of the old.

Luke 22:20 – Jesus identifies His blood as “the new covenant.”

2 Corinthians 1:20 – “For all the promises of God are ‘Yes’ in Christ.”

Hebrews 9:15 – Christ as Mediator of a covenant established on better promises.

Pastoral and Discipleship Application

• Guard the gospel from legalistic additions; teach believers that faith in Christ alone justifies.
• Encourage confidence in God’s unchanging character; He does not rescind what He has pledged.
• Use Galatians 3:15 to clarify the relationship between Law and grace in baptismal, confirmation, or membership classes.

Expository Suggestions

1. Begin with a contemporary contract (e.g., a notarized deed) to illustrate finality.
2. Trace the flow of Galatians 3:15-18, highlighting the chronological argument (promise → law → fulfillment).
3. Conclude with practical exhortation from Galatians 5:1: “It is for freedom that Christ has set us free.”

Devotional Reflection

Because God cannot lie or change His mind, every word He has spoken is secure. The believer need not fear that unforeseen clauses will one day surface. In Christ, the covenant stands complete, eternally signed with His blood.

Forms and Transliterations
επιδιατασσεται επιδιατάσσεται ἐπιδιατάσσεται epidiatassetai epidiatássetai
Links
Interlinear GreekInterlinear HebrewStrong's NumbersEnglishman's Greek ConcordanceEnglishman's Hebrew ConcordanceParallel Texts
Englishman's Concordance
Galatians 3:15 V-PIM/P-3S
GRK: ἀθετεῖ ἢ ἐπιδιατάσσεται
NAS: or adds conditions to it.
KJV: disannulleth, or addeth thereto.
INT: sets aside or adds thereto

Strong's Greek 1928
1 Occurrence


ἐπιδιατάσσεται — 1 Occ.

1927
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