Exploring the Meaning of Lanthano

λανθάνω expresses the idea of being hidden, appearing in narratives about concealment and exposure, in public speech about what is or is not concealed, and in exhortations that warn against a kind of forgetfulness. Across its uses, the word frames whether something remains out of sight or awareness, or instead comes to light.

Occurrences

“From there he arose, and went away into the borders of Tyre and Sidon. He entered into a house, and didn’t want anyone to know it, but he couldn’t escape notice.” (Mark 7:24)

Here the scene turns on an attempted concealment. The setting is private (“He entered into a house”) and the intention is to remain unknown (“didn’t want anyone to know it”), yet the attempt fails (“he couldn’t escape notice”). λανθάνω supplies the contrast between a desired hiddenness and an actual exposure: whatever measures are taken, the presence that was meant to remain concealed does not remain so.

“When the woman saw that she was not hidden, she came trembling, and falling down before him declared to him in the presence of all the people the reason why she had touched him, and how she was healed immediately.” (Luke 8:47)

The word marks the turning point from concealment to disclosure. The woman’s realization—“she was not hidden”—drives her to open confession “in the presence of all the people.” The narrative movement is from attempting to remain unnoticed to being unable to stay concealed, and then to voluntary, public explanation. λανθάνω names the status she no longer has: she cannot remain hidden, and the rest of the verse depicts the social and emotional weight of that exposure (“trembling,” “falling down,” and speaking openly).

“For the king knows of these things, to whom also I speak freely. For I am persuaded that none of these things is hidden from him, for this has not been done in a corner.” (Acts 26:26)

In this courtroom-like setting, λανθάνω supports an argument about public visibility. The speaker grounds frank speech in the king’s awareness: “none of these things is hidden from him.” The follow-up clause explains why: “this has not been done in a corner.” Hiddenness here is not about physical invisibility alone, but about whether events can be treated as obscure or tucked away. The word helps draw a line between what could plausibly be concealed and what, by its nature and setting, stands in the open and therefore cannot be considered hidden from an informed ruler.

“Don’t forget to show hospitality to strangers, for in doing so, some have entertained angels without knowing it.” (Hebrews 13:2)

λανθάνω frames hiddenness on the level of awareness: people can act in a way whose deeper reality remains concealed to them at the time. The instruction assumes ordinary encounters (“hospitality to strangers”) and then adds a startling possibility: “some have entertained angels without knowing it.” The concealment is not described as deception; rather, the verse pictures a situation where the true identity of the guests remains hidden from hosts. λανθάνω thus fits an ethical exhortation: because important realities may be concealed in everyday situations, hospitality should not depend on what one can immediately see or recognize.

“For this they willfully forget that there were heavens from of old, and an earth formed out of water and amid water by the word of God,” (2 Peter 3:5)

Here λανθάνω is used for a deliberate kind of hiddenness within the mind: “they willfully forget.” The verse is not describing a thing that is naturally hard to notice, but a refusal to keep something in view. What is pushed out of awareness is the confession that “there were heavens from of old” and that the earth’s formation is tied to “the word of God.” λανθάνω contributes the idea that something can be treated as hidden by an act of disregard—kept out of sight, not because it is inaccessible, but because one chooses to let it slip from notice.

“But don’t forget this one thing, beloved, that one day is with the Lord as a thousand years, and a thousand years as one day.” (2 Peter 3:8)

Again λανθάνω appears in an exhortation aimed at preventing a key point from being obscured. “Don’t forget this one thing” sets the statement that follows as something that must not be allowed to become hidden from consideration. The content given—“one day is with the Lord as a thousand years, and a thousand years as one day”—is presented as a perspective that shapes how time is to be regarded. λανθάνω thus operates as a guardrail for thought: do not let this perspective be hidden from your reckoning as you evaluate what is happening.

Sense and Usage

Across these passages, λανθάνω consistently carries the idea of hiddenness, but it does so in more than one sphere of life. In Mark 7:24 and Luke 8:47, the word’s force is concrete and situational: a person seeks to remain unknown or unnoticed, or discovers that concealment has failed. Hiddenness is measured by whether others “know it” or whether one is “hidden” from public attention, and the narrative tension comes from the moment concealment gives way to recognition.

Acts 26:26 shifts from personal concealment to the public character of events. The claim “none of these things is hidden from him” assumes that hiddenness can be a category for evaluating testimony: are the matters at hand obscure, privately staged, and thus plausibly unknown to the judge—or are they open, widely visible, and therefore not hidden? The additional line “this has not been done in a corner” paints hiddenness as what happens when actions are relegated to a place of obscurity. λanθάνω helps the speaker insist that the subject belongs to the realm of public knowledge rather than hidden rumor.

Hebrews 13:2 uses hiddenness in the register of recognition. The hosts do not “know” whom they are hosting; the guests’ identity can remain concealed while the hosts act. The logic of the exhortation depends on that concealment: if what is truly present can be hidden, then ethical action cannot be limited to what is immediately apparent. In this way λανθάνω supports moral seriousness in ordinary life by reminding readers that unseen realities may accompany commonplace encounters.

In 2 Peter 3:5 and 3:8, hiddenness is not about physical or social concealment but about what is allowed to recede from thought. “Willfully forget” presents hiddenness as something a person can produce by refusing to keep certain truths before the mind. Conversely, “don’t forget this one thing” warns readers not to let an essential perspective become hidden in their reasoning. In these verses λανθάνω describes the boundary between what is held in view and what is pushed into the background—hidden not by darkness or distance, but by neglect or deliberate omission.

Taken together, these occurrences show how λανθάνω can speak of hiddenness as (1) remaining unknown to others, (2) being out of public view, (3) being unrecognized by the person involved, and (4) being kept out of mind through forgetfulness. In each case the word marks a gap between reality and awareness—either others’ awareness (Mark; Luke), an authority’s awareness (Acts), a host’s awareness (Hebrews), or a community’s awareness of foundational truths and interpretive perspective (2 Peter). The passages also highlight the instability of hiddenness: what is intended to be concealed may “couldn’t escape notice,” what a person hopes to keep private may become publicly exposed, and what should remain in view may be deliberately allowed to slip into concealment within one’s thinking.

Imagery

The imagery attached to λανθάνω in these texts often turns on thresholds: a house meant to provide privacy yet fails to shield (“He entered into a house, and didn’t want anyone to know it, but he couldn’t escape notice,” Mark 7:24), and a moment when a concealed approach becomes an open, public statement (“she was not hidden… declared to him in the presence of all the people,” Luke 8:47). In Acts 26:26, the word evokes the difference between actions tucked away “in a corner” and actions that stand in the open, and in Hebrews 13:2 it imagines ordinary hospitality as a setting where the true identity of the guest can remain hidden. The two statements in 2 Peter portray hiddenness as something that can take place within memory and attention, where what is most decisive can be either obscured by willful forgetting or kept clear by deliberate remembrance.

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).