Quick Definition
λανθάνω v. I am hidden, escape notice
Strong's Definition
a prolonged form of a primary verb, which is used only as an alternate in certain tenses; to lie hid (literally or figuratively); often used adverbially, unwittingly
KJV Usage: be hid, be ignorant of, unawares
UBS Dictionary of the Greek New Testament
verb | aor. ἔλαθον · inf. λαθεῖν | ἀλήθεια · ἀληθεύω · ἀληθής · ἀληθινός · ἀληθῶς · ἐκλανθάνομαι · ἐπιλησμονή · λάθρᾳ · λήθη
28.83 · Know · Not Able To Be Known, Secret
to escape notice, to remain hidden to cause oneself to not be known, with the implication of concealment and secrecy In some languages this expression in MRK 7:24 may be rendered as ‘he was not able to keep people from knowing where he was’ or ‘he was not able to keep secret where he was.’
29.13 · Memory and Recall · Not Remembering, Forgetting
to forget, to not remember, to lose sight of, to ignore to not recall information and thus to lose sight of its significance In a number of languages the fact of ‘forgetting’ or ‘not remembering’ is expressed idiomatically, for example, ‘to lose out of one’s heart,’ ‘to have one’s thoughts walk away,’ or ‘to have words disappear from one’s liver.’
28.14 · Know · Know
to be unaware of, to not know to not have knowledge about or to be unaware of something, with the implication that something can readily escape notice or be hidden
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
λανθάνω (lengthened form of λήθω) ; 2 aor. ἔλαθον, (whence Lat. latere); Sept. several times for D4 3, ete.; [fr. Hom. down]; to be hidden: Mk. vii. 24; Lk. viii. 47; τινά, to be hidden from one, Acts xxvi. 26; 2 Pet. iii. 5 (on which see θέλω, 1 sub fin.), 8; ace. to the wellknown classic usage, joined in a finite form to a ptep. i. q. secretly, unawares, without knowing, (cf. Matthiae § 552 B.; Passow 8. v. ii. p. 18°; [L. and 5. 5. v. A. 2]; W. § 54,4; [B. § 144, 14]): ἔλαθον ξενίσαντες, have unawares entertained, Heb. xiii. 2. [Comp.: ék-, ἐπι(-par).J
Mounce Concise Greek Dictionary
λανθάνω lanthanō 6x
to be unnoticed; to escape the knowledge or observation of a person, Acts 26:26; 2 Pet. 3:5, 8; absol. to be concealed or hidden, escape detection, Mk. 7:24; Lk. 8:47; with a participle of another verb, to be unconscious of an action while being the subject or object of it, Heb. 13:2*
Abbott-Smith Greek Lexicon
λανθάνω,
[in LXX for עלם ni., etc.;]
to escape notice, be hidden (from): Mk 7:24, Lk 8:47; c. acc. pers., Ac 26:26, II Pe 3:5, 8; as in common cl. idiom, seq. ptcp., ἔλαθον ξενίσαντες, entertained unawares, He 13:2 (cf. ἐκ-, ἐπι-λανθάνω).†
Moulton & Milligan — Vocabulary of the Greek NT
λανθάνω. The construction in Ac 2655 may be illustrated by P Oxy I. 34 verso M1. 8 (A.D, 127) οὐκ ἔλαθέ pe, “it did not escape my notice,” 26. III. 530° (ii/A.D.) ἐμὲ δὲ ἐλελήθει διαστέλλ, λαὸς [εἰὖν τι, ““ῬαΓ1 had forgotten to make any order for payment” (Edd.), 2. X. 1253°? (iv/A.D.) ἵνα μηδέν cov λανθάνῃ τὴν λαμπρότητα pyvvopev, ‘‘ we give this information in order that nothing may escape your highness’ (Edd.). The verb is used without an obj. in P Strass I. 73° (iii/A.p.) ἔλαθέν ye κεράμια ὀψαρίων εἰς διάπρασιν, ‘the jars for dainties are lacking for sale.” With the usage in Heb 13 cf. P Gen 1. 171° (iii/A.D.) ὑφωροῦμε (= thopGpar)..... μὴ ἄρ[α ἐἸνθρώσκων [. . . ἔλ]αθεν ὕϊδατ]ι, “1 suspect he may have jumped into the water unnoticed ᾿᾿ : see also P | Hamb I. 27) (B.c. 250) οὐκ ἔτι οὖν παρέλαβέμ. pe, GAN ἔλαθέμ pe κομισάμενος. MGr λαθαίνω (ἔλαθα).
Liddell-Scott-Jones — Greek-English Lexicon
λανθάνω (lanthanō) — be hidden. λανθάνω, [Refs 5th c.BC+]:—also λήθω (which is the form of the active generally used in compounds, δια-λανθάνω being the sole exception), [Refs 8th c.BC+]; Doric dialect λάθω [ᾱ] [Refs 5th c.BC+]; infinitive __A λᾱθέμεν [Refs 5th c.BC+]: imperfect ἐλάνθανον [Refs 8th c.BC+]; Epic dialect λῆθον [Refs 8th c.BC+]; Ionic dialect λήθεσκεν [Refs]: future λήσω [Refs 8th c.BC+]; Aeolic dialect infinitive λᾱσην [Refs 7th c.BC+]; Doric dialect λᾱσῶ [Refs 3rd c.BC+]: aorist 1 ἔλησα [Refs 8th c.BC+]: aorist 2 ἔλᾰθον [Refs 8th c.BC+]: perfect λέληθα [Refs 7th c.BC+]; Aeolic dialect participle λελᾱθων [Refs 7th c.BC+]pluperfect ἐλελήθειν, Attic dialect -ήθη, [Refs 5th c.BC+]; Ionic dialect3rd.pers. singular ἐλελήθεε [Refs 5th c.BC+] __B causal ληθάνω, aorist 2 λέλᾰθον, see below [Refs 5th c.BC+] __C middle and passive, λανθάνομαι [Refs 8th c.BC+]; Doric dialect λάθομαι [ᾱ] [Refs 5th c.BC+]: Epic dialect imperfect λανθανόμην [Refs 8th c.BC+]: future λήσομαι [Refs]; Doric dialect λᾱσεῦμαι [Refs 5th c.BC+]aorist 1 ἐλησάμην or λησάμην only in late Epic dialect, [Refs 3rd c.BC+] (Doric dialect λᾱς-), [Refs 4th c.AD+]; also ἐλήσθην, Doric dialect infinitive λασθῆμεν [Refs 3rd c.BC+]aorist 2 ἐλᾰθόμην, Epic dialect λαθ-, [Refs 8th c.BC+]: rare in Prose except in compounds, [Refs 1st c.AD+]; also Epic dialect reduplicate λελάθοντο, etc., see below c: perfect λέλησμαι [Refs 5th c.BC+]; Epic dialect λέλασμαι, participle λελασμένος, etc.; compare ἐπιλήθω. __A in most of the active tenses, escape notice (frequently joined with a negative):—Constr.: __A.1 with accusative person only, escape his notice, λάθε δ᾽ Ἕκτορα [Refs 8th c.BC+]; εἰ λανθάνει σε perhaps you don't know, [Refs 4th c.BC+] it escaped the notice of the people, [Refs 5th c.BC+]; σὲ δὲ λέληθεν περὶ τοῦτο ὡς.. [Refs 5th c.BC+] __A.2 most frequently with a participle added, in which case we usually translate the participle by a Verb, and express λανθάνω by an adverb, unawares, without being observed; either, __A.2.a with accusative person, ἄλλον τινὰ λήθω μαρνάμενος I am unseen by others while fighting, i.e. [Refs]unseen by them, [Refs 8th c.BC+] lest he come on unseen by me, [Refs 5th c.BC+]; ὅπως μὴ λήσουσιν αὐτοὺς αἱ νῆες.. ἀφορμηθεῖσαι should put to sea without their observing them, [Refs 5th c.BC+]; or, __A.2.b without an accusative, φονέα ἐλάνθανε βόσκων he maintained the murderer unawares, [Refs 5th c.BC+]: the reflexive pronoun may be supplied and is sometimes added, λέληθεν αὑτὸν τοῖς ξυνοῦσιν ὢν βαρύς [Refs 8th c.BC+]; μὴ διαφθαρεὶς λάθῃ [τινὰ ὁ βίος] [Refs 5th c.BC+] —In a few examples this _construction_ is reversed, and λαθών is put in the participle, as in our idiom, ἀπὸ τείχεος ἆλτο λαθών (for ἔλαθεν ἁλόμενος) [Refs 8th c.BC+] __A.3 rarely with accusative et infinitive, μή σε λαθέτω ὑπερτιθέμεν let it not escape thee to.., i.e. forget not to.., [Refs 5th c.BC+]; σφᾶς λέληθε Θεόδωρον εἶναι it has been unnoticed that it was.., [Refs 2nd c.AD+] __A.4 followed by a relative clause, οὐδέ με λήθεις, ὅττι θεῶν τίς σ᾽ ἦγε thou escapest me not, it is not unknown to me, that some god led thee, [Refs 8th c.BC+]; ἐδόκεες θεοὺς λήσειν οἷα ἐμηχανῶ thou thought'st to escape the gods' notice in.., [Refs 5th c.BC+]; οὐ λανθάνεις με, ὅτι.. [Refs 5th c.BC+]; ὁ γείτων λ. τινὰ οὐ μόνον ὅτι πράττει, ἀλλ᾽ εἰ.. [Refs 5th c.BC+] __A.5 absolutely, escape notice or detection, [Refs 5th c.BC+] __B causal, make one forget a thing, with genitive of things, in compounds ἐκληθάνω, ἐπι-λήθ; the simple Verb only in Epic dialect reduplicate aorist 2, ὄφρα.. λελάθῃ ὀδυνάων that.. he may cause him to forget his pains, [Refs 8th c.BC+] __B.II in late Epic dialect, λέλαθον, ={ἔλαθον}, escaped notice of, ἑὸν νόον, τοκῆας, [Refs 3rd c.BC+] __C middle and passive, let a thing escape one, forget, __C.1 forget simply, in present (absolutely), σὺ δὲ λήθεαι [Refs 8th c.BC+]: mostly in aorist 2, ἀλκῆς λαθέσθαι [Refs 8th c.BC+]: also in reduplicate aorist, οὐδὲ σέθεν.. θεοὶ μάκαρες λελάθοντο [Refs 8th c.BC+] that she might bear unknown): so in perfect, τῶν δὲ λέλασται [Refs 8th c.BC+]: with a relative clause, λελασμένος ὅσσ᾽ ἐπεπόνθει [Refs 8th c.BC+]: future middle in passive sense, once in [Refs 5th c.BC+] never will be forgotten, El.1249 (Lyric poetry); compare ἐπιλανθάνω. __C.2 forget purposely, pass over, ἢ λάθετ᾽ ἢ οὐκ ἐνόησεν either he chose to forget it.., [Refs 8th c.BC+] __C.II in later writers future middle is used like active, escape notice, ἡμᾶς [Refs 4th c.BC+]