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G2178

ἐφάπαξ

ephápax /ef-ap'-ax/ Ask about this word
from ἐπί and ἅπαξ
upon one occasion (only)
(at) once (for all).

Word Study

In depth

A plain-language study of ephápax — the range of meaning it carries, how Scripture actually uses it, and where it points. Written for readers who don’t know the original language.

Core Meaning & Semantic Range

The Greek word ephápax, represented by G2178, means upon one occasion (only) or once (for all). Though it appears only 5 times in 5 unique verses, its theological impact is immense, signifying a singular, definitive, and unrepeatable action. It marks an event as complete and final.

Biblical Occurrences & Contextual Analysis

The primary use of G2178 is to contrast the finished work of Christ with the repetitive rituals of the Old Covenant. Unlike the earthly high priests G749 who needed to offer sacrifice G2378 daily for sins, Christ did this once when he offered up himself G1438 Hebrews 7:27. This single act was sufficient; He died unto sin G266 once Romans 6:10 and entered into the holy place G39 once, having obtained eternal redemption G3085 Hebrews 9:12. The term is also used in a more literal sense to mean "at the same time," as when Christ was seen by over five hundred G4001 brethren G80 at once after His resurrection 1 Corinthians 15:6.

Related Words & Concepts

Several related words help clarify the unique finality conveyed by G2178:

  • G749 archiereús (chief (high) priest): This term identifies the religious leaders whose work was repetitive and incomplete. They needed to offer sacrifices daily, unlike Christ who performed His role once Hebrews 7:27.
  • G2378 thysía (sacrifice): The offering for sin. Christ's one-time act is contrasted with the ongoing need for the sacrifice of animals under the old system Hebrews 7:27. Believers are now called to present their bodies as a living sacrifice Romans 12:1.
  • G3085 lýtrōsis (a ransoming...redemption): This is the direct result of Christ's singular action. By entering the holy place once, He obtained eternal redemption for us Hebrews 9:12.

Theological Significance

The theological weight of G2178 is concentrated in several key doctrines:

  • The Finality of Christ's Sacrifice: The sacrifice of Christ is complete and all-sufficient. He does not need to offer Himself again and again, as the high priests did for their sins G266 and for the people's G2992. He did this once Hebrews 7:27.
  • The Securing of Eternal Redemption: Christ's single entrance into the holy place G39 by His own blood G129 was not a temporary measure. This one act was enough to obtain eternal G166 redemption G3085 Hebrews 9:12.
  • The Basis for Our Sanctification: As a result of Christ's finished work, believers are sanctified G37 through the offering G4376 of the body G4983 of Jesus Christ G5547 once for all Hebrews 10:10.

Summary

In summary, G2178 is a powerful term that defines the nature of Christ's atoning work. While it can describe a group of people acting at once 1 Corinthians 15:6, its chief contribution is theological. It establishes Christ's self-offering as a singular, decisive event that stands in stark contrast to the endless cycle of sacrifices it replaced. His death was a once-for-all act that secured eternal redemption Hebrews 9:12 and provides the foundation for our sanctification.

How the KJV Renders It

Translation

Strong’s lists the renderings but not their weight. These are counted from the King James text of the tagged verses — the bar under each is how often the translators actually reached for it. Select one to filter the occurrences below.

Grammatical Forms

Morphology

In the Greek New Testament, this word appears as an adverb across 5 occurrences, inflected in 1 grammatical form — each row is one form, and the bar is how often it is that form.

  • Adverb

Related Words

Related

Other entries the study above points to — each one is drawn from a reference it makes. Follow the trail to see how the words connect.

Theographic Context

Context

The people, places, and span of history the verses containing this word touch on — drawn from the theographic tagging of Scripture. Select any name to isolate its verses in the occurrence list.

Biblical Distribution

Distribution

Appears in 5 verses across 3 of the 27 books. Most frequent in Hebrews (3 verses); never once in the other 24.

1
Romans
1
1 Corinthians
3
Hebrews

Every Occurrence

Concordance

Every verse where the word is tagged in the King James text. Filter by book, by the English word the translators chose, or search within the verses.

Sources. Definition and numbering: James Strong, Exhaustive Concordance of the Bible (1890). Morphology: STEPBible / Tyndale House (CC BY). Verse tagging: the King James text keyed to Strong’s numbers. Every count on this page is computed from the tagged corpus, not estimated.