Exploring the Meaning of Eklanthanomai in Greek

ἐκλανθάνω means “to forget,” and it appears once in the New Testament, in Hebrews 12:5. There it frames a warning about losing hold of a particular word of exhortation addressed to God’s children.

Root and Related Words

ἐκλανθάνω is built from ek (ἐκ), “out from,” and lanthano (λανθάνω), “be hidden.” The combination presents forgetting as something that happens when a matter slips out from view—when it becomes hidden from awareness.

Occurrences

“You have forgotten the exhortation which reasons with you as with children, “My son, don’t take lightly the chastening of the Lord, nor faint when you are reproved by him;”” (Hebrews 12:5)

Here ἐκλανθάνω stands as a direct charge: “You have forgotten….” The object of the forgetting is specific—“the exhortation which reasons with you as with children”—so the verb does not describe a vague lapse of memory but a failure to keep a particular, addressed word present and operative. The exhortation is portrayed as actively engaging its hearers (“reasons with you”), and the forgetting therefore functions as a breakdown in that ongoing engagement: the voice that speaks “as with children” is no longer being kept in view.

The quoted exhortation (“My son…”) then spells out what this forgotten word was meant to do in the readers’ experience. It aims to shape how they respond to “the chastening of the Lord” and to being “reproved by him.” In that setting, forgetting is not merely intellectual. It produces practical misreadings and misresponses: the warning against taking the Lord’s chastening “lightly” and the warning against fainting when reproved both assume a moment of pressure where interpretation and endurance matter. ἐκλανθάνω names the loss of the interpretive framework that would keep chastening from being dismissed on the one hand or from becoming overwhelming on the other.

The wording also shows the relational context of the forgetting. The exhortation addresses the hearers “as with children,” and it speaks in the intimate direct address “My son.” Forgetting in Hebrews 12:5 thus has a family-register setting: the issue is not that an impersonal rule was misplaced, but that a paternal, child-addressing exhortation has been allowed to slip from awareness. The verb marks the gap between being spoken to in that way and living as though that voice were no longer present.

Sense and Usage

In Hebrews 12:5, “to forget” functions as a diagnosis of spiritual and moral attention. The verse is not content to say that the readers are suffering or being corrected; it says they have let something go missing from their consciousness—the “exhortation” that interprets their experience and addresses them personally. The force of ἐκλανθάνω is therefore tied to the consequences of neglect: when the exhortation becomes “hidden” from the mind, the sufferer is left without the counsel that steadies response under “chastening” and “reproof.”

The structure of the sentence shows how forgetting is measured. It is measured not by the inability to recite words but by the mismatch between the exhortation’s intent and the readers’ present stance. The exhortation “reasons with you,” implying that it is meant to be heard as a living appeal, guiding the reader through an argument about how to respond as a child of the Lord. Forgetting, then, is the condition in which that reasoning voice is no longer governing perception. Under that condition, two distortions become likely, and the quoted exhortation addresses both: treating the Lord’s chastening as insignificant (“don’t take lightly”) and collapsing inwardly under the weight of correction (“nor faint”).

Because ἐκλανθάνω targets the relationship between a remembered word and a lived situation, the verb in this passage carries an implicit contrast between present hardship and stored counsel. The exhortation is available, already spoken, already suited to the readers (“with you”), yet it has been allowed to recede. Forgetting is thus the failure to bring the fitting word to bear on the fitting moment. In the flow of Hebrews 12:5, the charge “You have forgotten” prepares for the corrective re-presentation of the exhortation itself: the verse responds to forgetfulness by setting the admonition before the audience again, as speech that must be kept near when chastening and reproof are being experienced.

Imagery

The images in Hebrews 12:5 give forgetting a concrete setting: a child addressed by a fatherly voice, and the lived experience of “chastening” and “reproof.” Within that setting, ἐκλανθάνω evokes the picture of counsel that has slipped out of sight at the very time it is needed—so that the hearer, lacking the remembered exhortation, is tempted either to shrug off discipline or to lose heart beneath it.

Sources: Lexical data from Strong’s Exhaustive Concordance and the Translators Brief Lexicon of Extended Strongs for Greek (STEPBible, CC BY). Occurrence data from the Translators Amalgamated Greek New Testament (STEPBible, CC BY). Scripture quotations from the World English Bible (public domain).