Lexical Definition

‎εἴδω‎ eídō (i'-do) to perceive: understand ^G:V
a primary verb

be aware, behold, X can (+ not tell), consider, (have) know(-ledge), look (on), perceive, see, be sure, tell, understand, wish, wot.

• used only in certain past tenses, the others being borrowed from the equivalent ‎ὀπτάνομαι‎ and ‎ὁράω‎
• properly, to see (literally or figuratively)
• by implication, (in the perfect tense only) to know

Abbott-Smith

οἶδα, (from same root as εἶδον, q.v.), [in LXX chiefly for ידע;] pf. with pres. meaning (plpf. as impf.; on irregular tense-forms, v. App.),
to have seen or perceived, hence, to know, have knowledge of: c. acc. rei, Mt 25:13, Mk 10:19, Jo 10:4, Ro 7:7, al.; c. acc. pers., Mt 26:72, Jo 1:31, Ac 3:16, al.; τ. θεόν, I Th 4:5, Tit 1:16, al.; c. acc. et inf., Lk 4:41, al.; seq. ὅτι, Mt 9:6, Lk 20:21, Jo 3:2, Ro 2:2 11:2, al.; seq. quaest. indir., Mt 26:70, Jo 9:21, Eph 1:18, al.; c. inf., to know how (cl.), Mt 7:11, Lk 11:13, Phl 4:12, I Th 4:4, al.; in unique sense of respect, appreciate: I Th 5:12 (but v. also ICC on I Th 4:4).
SYN.: v.s. γινώσκω.

Abbott-Smith References

Liddell-Scott-Jones

meaning of: εἴδω

εἴδω,

no active present in use, ὁράω being used:—middle, see.below [Refs 4th c.BC+]: aorist 2 εἶδον always in sense of see (so in present and aorist 1 middle, to be seen, i.e. seem): but perfect οἶδα, in present sense, know. (With ἔ-ϝιδον, compare (ϝ) είδομαι, (ϝ) εῖδος, Latin videre; with (ϝ) οῖδα, cf. Sanskrit véda, Gothic wait, O[Refs 5th c.BC+] wát 'know'.)

__A aorist 2 εἶδον (late εἶδα [Refs 5th c.AD+]aorist to ὁράω, Epic dialect ἴδον, iterative ἴδεσκε [Refs 8th c.BC+], late Aeolic dialect εὔιδον [Refs]; imperative ἴδε (in Attic dialect written as adverb ἰδέ, behold! Hdn.Gr.2.23), ἴδετ; subjunctive ἴδω, Epic dialect ἴδωμι [Refs 8th c.BC+]; optative ἴδοιμ; infinitive ἰδεῖν, Epic dialect ἰδέει; participle ἰδών: hence, future ἰδησῶ [Refs 3rd c.BC+] —middle, aorist 2 εἰδόμην, Epic dialect ἰδόμην, in same sense, poetry, Ionic dialect, and later Prose (with genitive, [Refs 4th c.BC+]; imperative ἰδοῦ (frequently written as adverb ἰδού, ={ἰδέ}); subjunctive ἴδωμα; optative ἰδοίμη; infinitive ἰδέσθα; participle ἰδόμενος [Refs 5th c.BC+]
__1 see, perceive, behold, ὀφθαλμοῖσι or ἐν ὀφθαλμοῖσι ἰδέσθαι see before the eyes, [Refs 8th c.BC+]; ἄγε, πειρήσομαι ἠδὲ ἴδωμαι well, I will try and see, [Refs 8th c.BC+]; mark, observe, [Refs 8th c.BC+]: frequently in infinitive after substantive or adjective, θαῦμα ἰδέσθαι a marvel to behold, [Refs 8th c.BC+]
__1.b see a person, i.e. meet him, speak with him, [Refs 5th c.BC+]
__1.c see, i.e. experience, νόστιμον ἦμαρ ἰδέσθαι [Refs 8th c.BC+]; ἀλόχου κουριδίης.. οὔ τι χάριν ἴδε he saw (i.e. enjoyed) not the favour of his wedded wife, [Refs 8th c.BC+]
__2 look, ἰδεῖν ἐς.. look at or towards, [Refs]; πρός.. [Refs 8th c.BC+]; εἰς ὦπα ἰδέσθαι look him in the face, [Refs 8th c.BC+] adverb or adjective, ὑπόδρα ἰδών looking askance, [Refs 8th c.BC+]; ἀχρεῖον ἰδών looking helpless, [Refs]; κέρδος ἰδεῖν look to gain, [Refs 4th c.BC+]
__3 see mentally, perceive, ἰδέσθαι ἐν φρεσίν 'to see in his mind's eye', [Refs 8th c.BC+]
__3.b examine, investigate, [Refs]; consider, ἴδωμεν τί λέγομεν [Refs]
__II middle, present εἴδομαι, Epic dialect ἐείδεται [Refs 3rd c.BC+], participle ἐειδόμενος [Refs 5th c.BC+]aorist εἰσάμην, Epic dialect participle ἐεισάμενος [Refs 8th c.BC+]:—only Epic dialect and Lyric poetry, to be seen, appear, εἴδεται ἄστρα they are visible, appear,[Refs 8th c.BC+]; perhaps also οὔ πῃ χροὸς εἴσατο none of the skin was visible, [Refs 8th c.BC+]
__II.2 with infinitive, appear or seem to be, τὸ δέ τοι κὴρ εἴδεται εἶναι [Refs 8th c.BC+]: with infinitive omitted, οἱ τό γε κέρδιον εἴσατο θυμῷ [Refs 8th c.BC+]; also, look like or make a show of.., εἴσατ᾽ ἴμεν ἐς Λῆμνον he made a show of going to Lemnos, [Refs 8th c.BC+]; εἴσατο δ᾽ ὡς ὅτε ῥινόν it had the look as of a shield, [Refs]
__II.3 strictly middle, with dative, εἴσατο φθογγὴν Πολίτῃ she made herself like Polites in voice, [Refs 8th c.BC+]: especially in participle, like, εἰδομένη κήρυκι [Refs 8th c.BC+]
__B perfect, οἶδα I know, used as present: pluperfect ᾔδεα (see. below), I knew, used as imperfect:—perfect οἶδα, Aeolic dialect ὄϊδα [Refs 7th c.BC+]; 2nd pers. singular οἶδας once in [Refs 8th c.BC+]; οἶσθα elsewhere in [Refs 8th c.BC+], Attic dialect, etc.; in Comedy texts also sometimes οἶσθας [Refs 5th c.BC+]; plural, ἴσμεν, Epic dialect, Aeolic dialect, and Doric dialect ἴδμεν, also Ionic dialect, [Refs 5th c.BC+]; ἴστε, ἴσασι [ῐς- [Refs 8th c.BC+]; οἴδαμεν [Refs 5th c.BC+] were formed Doric dialect 1st pers. singular ἴσᾱμι [Refs 5th c.BC+]; 3rd.pers. singular ἴσατι [Refs]; 1st pers. plural ἴσᾰμεν [Refs 5th c.BC+]; Cretan dialect 3rd.pers. plural subjunctive ἴθθαντι [Refs]; infinitive ϝισάμην[Refs]; participle ἴσας [Refs 5th c.BC+]subjunctive εἰδῶ (εἰδέω, ἰδέω, [Refs 8th c.BC+], Ionic dialect 3rd.pers. plural εἰδέωσι [Refs 5th c.BC+]; Epic dialect also εἴδω [Refs 8th c.BC+], 1st pers. plural εἰδεῖμεν [Refs 5th c.BC+]: infinitive εἰδέναι, Epic dialect ἴδμεναι, ἴδμεν, also ἰδέμεν [Refs 5th c.BC+]: participle εἰδώς, εἰδυῖα, Epic dialect also ἰδυῖα, Elean ϝειζώς [Refs]:—pluperfect ᾔδεα [Refs 8th c.BC+], contraction ᾔδη [Refs 8th c.BC+] frequently in codices, [Refs 8th c.BC+] (also later Attic dialect, accusative to [Refs 5th c.BC+] (variant -εις, - ει), [Refs 8th c.BC+]; Attic dialect also 1st pers. singular ᾔδειν [Refs 4th c.BC+], 2nd pers. singular ᾔδεις [Refs 5th c.BC+], Ionic dialect ᾐδέατε [LXX+6th c.BC+]; late Epic dialect ᾔδειν, ἠείδειν, [Refs 5th c.BC+]; Epic dialect 3rd.pers. plural ἴσαν [Refs 8th c.BC+]:—future, in this sense, εἴσομαι [Refs 8th c.BC+]; infinitive εἰδησέμεν [Refs 8th c.BC+] —The aorist and perfect are usually supplied by γιγνώσκ; aorist 1 infinitive εἰδῆσαι is found in [Refs 5th c.BC+]; 3rd.pers. plural subjunctive εἰδήσωσιν Herzog Koische Forschungen No.[Refs 2nd c.BC+]:—know, have knowledge of, be acquainted with, [Refs 8th c.BC+]; νοήματα, μήδεα οἶδε, [Refs 8th c.BC+]; πρῶτος ὧν ἡμεῖς ἴδμεν the first we know of, [Refs 5th c.BC+] know well, be assured of this, [Refs 8th c.BC+] adjective, to express character or disposition, ἄγρια οἶδε has fierceness in his heart, [Refs 8th c.BC+]; ἀθεμίστια ᾔδη had law lessness in his heart, [Refs 8th c.BC+]; εἴ μοι ἤπια εἰδείη if he were kindly disposed towards me, [Refs 8th c.BC+]: with genitive, ὃς σάφα θυμῷ εἰδείη τεράων [Refs 8th c.BC+]; τόξων ἐῢ εἰδώς cunning with the bow,[Refs 8th c.BC+]; χάριν εἰδέναι τινί acknowledge a debt to another, thank him,[Refs 5th c.BC+] be Zeus my witness, [Refs 8th c.BC+]; Boeotian dialect ἴττω Ἡρακλῆς etc., [Refs 5th c.BC+]participle εἰδώς, absolutely, one who knows, one acquainted with the fact, ἰδυίῃ πάντ᾽ ἀγορεύω [Refs 8th c.BC+]; also ἰδυίῃσι πραπίδεσσι with knowing mind, [Refs 8th c.BC+]
__B.2 with infinitive, know how to do, οἶδ᾽ ἐπὶ δεξιά, οἶδ᾽ ἐπ᾽ ἀριστερὰ νωμῆσαι βῶν [Refs 5th c.BC+]; also, to be in a condition, be able, have the power, [Refs 5th c.BC+]; of drugs, ὅσα λεπτύνειν οἶδε [Refs 2nd c.AD+]; of a festival, οἶδε ἐκπέμπουσα δάκνειν Chor.p.124 [Refs 5th c.BC+]; learn, ἵν᾽ εἰδῇ μὴ 'πὶ τοῖς ἐμοῖς κακοῖς ὑψηλὸς εἶναι [Refs 5th c.BC+]
__B.3 with participle, to know that such and such is the fact, the participle being in nominative when it is a predicate of the Subject of the Verb, ἴσθι μοι δώσων know that thou wilt give, [Refs 5th c.BC+]: in accusative when it is predicate of the Object, τοὺς φιλτάτους γὰρ οἶδα νῷν ὄντας πικρούς [Refs 5th c.BC+]participle omitted, γῆν αὐτὰ οἶδεν ἀμφότερα (i.e. ὄντα) [Refs 4th c.AD+]
__B.4 less frequently c.accusative et infinitive, πλήθους.. ἂν σάφ᾽ ἴσθ᾽ ἕκατι βάρβαρον ναυσὶν κρατῆσαι [Refs 5th c.BC+]
__B.5 with accusative followed by ὡς, ὅτι, etc., οἶδα κἀμαυτὴν ὅτι ἀλγῶ [Refs 5th c.BC+]
__B.6 οὐκ οἶδ᾽ εἰ.. I know not whether, to express disbelief or doubt, sometimes with ἄν transposed, οὐκ οἶδ᾽ ἂν εἰ πείσαιμί σε [Refs 5th c.BC+] perhaps no other, [Refs 5th c.BC+]
__B.7 in similar ellipses with other Conjunctions, οὐκ οἶδ᾽ ὅπως I know not how, [Refs 5th c.BC+]
__B.8 οἶδα, ἴσθι are frequently parenthetic, οἶδ᾽ ἐγώ [Refs 5th c.BC+]; also οἶδ᾽ ὅτι, οἶσθ᾽ ὅτι, ἴσθ᾽ ὅτι, πάρειμι δ᾽ ἄκων οὐχ ἑκοῦσιν, οἶδ᾽ ὅτι (i.e. πάρειμι) I know it well, [Refs 5th c.BC+]; οἶδ᾽ ὅτι, frequently in [Refs 5th c.BC+] —οἶσθ᾽ ὅ, οἶσθ᾽ ὡς, with _imperative_, are common in Trag. and Comedy texts, οἶσθ᾽ οὖν ὃ δρᾶσον; do—thou know'st what, i.e. make haste and do, [Refs 5th c.BC+]; οἶσθ᾽ ὡς πόησο; [Refs 5th c.BC+]; also οἶσθ᾽.. ὡς νῦν μὴ σφαλῇ; [Refs]; οἶσθα νῦν ἅ μοι γενέσθ; [Refs 5th c.BC+]future, οἶσθ᾽ οὖν ὃ δράσεις (nisileg. δρᾶσον); [Refs]

_{LSJ Scripture Refs: LXX.Gen.42.23}