be necessary

Greek, Verb

δεῖ impersonal (δέω), [in LXX chiefly for infin. with לְ;] one must, it is necessary: with inf, Mat.26:54, Mrk.13:7, Act.5:29, al; with accusative and inf, Mat.16:21, Mrk.8:31, Jhn.3:7, Act.25:10, al; with ellipse of accusative, Mat.23:23; of accusative, and inf, Mrk.13:14, Rom.1:27 8:26; οὐ (μὴ) δεῖ (non licet), ought not, must not: Act.25:24, 2Ti.2:24; impf, ἔδει, of necessity or obligation in past time regarding a past event (Bl, § 63, 4), Mat.18:33, Luk.15:32, Jhn.4:4, Act.27:21, al; periphr, δέον ἐστίν (as in Attic, χρεών ἐστι = χρή, see: δέον), Act.19:36; id, with ellipse of ἐστίν, 1Pe.1:6 τὰ μὴ δέοντα (= ἃ οὐ δεῖ 1Ti.5:13. SYN.: ὀφείλει, expressing moral obligation, as distinct from δεῖ, denoting logical necessity and χρή, a need which results from the fitness of things (see Tr, Syn., § cvii, 10; Westc. on Heb.2:1, 1Jn.2:6; Hort on Jas.3:10). (AS)

be necessary

Greek, Verb

δεῖ: subjunctive δέη, sometimes contraction δῆ (in codices of Comedy texts, as [Refs 5th c.BC+]; ὁπόσου κα δῆ [Refs 5th c.BC+]; infinitive δεῖ; participle δέον (see. infr. IV): imperfect ἔδει, Ionic dialect ἔδεε: future δεήσει [Refs 5th c.BC+]: aorist I ἐδέησε [Refs 5th c.BC+] —Impers. from δέω (A), there is need (the sense of moral obligation, properly belonging to χρή, is later, [Refs 5th c.BC+] I) c.accusative person et infinitive, it is needful for one to do, one must, once in [Refs 8th c.BC+] why need the Argives fight? [Refs 8th c.BC+]: with nominative of the pronoun, ἡγούμην. δεῖν. μεγαλοψυχότερος φαίνεσθαι [Refs 5th c.BC+]: rarely with dative person, there is need of. for, θεοῖσι προσβαλεῖν χθονὶ ἄλλην δεήσει γαῖαν [Refs 5th c.BC+] I.2) with accusative of things et infinitive, δεῖ τι γενέσθαι [Refs 5th c.BC+]; also ἐπεὶ δέ οἱ ἔδεε κακῶς γενέσθαι since it was fated for him, since he was doomed, [Refs 5th c.BC+]; for οἴομαι δεῖν, see at {οἴομαι}. I.3) absolutely with infinitive understood, μὴ πεῖθ᾽ ἃ μὴ δεῖ (i.e. πείθειν) [Refs 5th c.BC+]; εἴ τι δέοι, ἤν τι δέῃ (i.e. γενέσθαι), [Refs 5th c.BC+]; κἂν δέῃ (i.e. τροχάζειν), τροχάζῶ [Refs 6th c.BC+] II) with genitive of things, there is need of, frequently with negative, οὐδὲν ἂν δέοι πολλοῦ ἀργυρίου [Refs 5th c.BC+]; sometimes with infinitive added, μακροῦ λόγου δεῖ ταῦτ᾽ ἐπεξελθεῖν [Refs 4th c.BC+] II.b) frequently in phrases, πολλοῦ δεῖ there wants much, far from it, ὀλίγου δεῖ there wants little, all but; in full with infinitive, πολλοῦ δεῖ οὕτως ἔχειν [Refs 5th c.BC+]; τοῦ πλεῦνος αἰεὶ ἔδεε there was always further to travel, [Refs 5th c.BC+] absolutely, in same sense, [Refs 5th c.BC+] II.2) with dative person added, δεῖ μοί τινος [Refs 5th c.BC+] II.3) with accusative person added, αὐτὸν γάρ σε δεῖ προμηθέως [Refs 5th c.BC+] II.4) rarely with Subj. in nominative, δεῖ μοί τι something is needful to me, ἓν δεῖ μόνον μοι [Refs 5th c.BC+] III) middle, δεῖται there is need, with genitive, δεῖταί σοι τῆς αὐτῆς ἐρωτήσεως [Refs 5th c.BC+]: with infinitive, ὥστε βραχἔ ἐμοὶ δεῖσθαι φράσαι [Refs 5th c.BC+] IV) neuter participle δέον (δεῖν is uncertain in [Refs 5th c.BC+]: absolutely, it being needful or fitting, [Refs 5th c.BC+]; οὐκ ἀπήντα, δέον, he did not appear in court, though he ought to have done so, [Refs 4th c.BC+]: with infinitive, [Refs 5th c.BC+]; οὐδὲν δέον there being no need, [Refs 5th c.BC+]: future ὡς αὐτίκα δεῆσον διώκειν [Refs 5th c.BC+]: aorist δεῆσαν [Refs 2nd c.BC+] with accusative infinitive, [Refs 1st c.AD+] IV.2) substantive δέον, τό (see entry vocative).

Greek

Verb

also deon deh-on'; neuter active participle of the same; both used impersonally; it is (was, etc.) necessary (as binding); behoved, be meet, must (needs), (be) need(-ful), ought, should; 3rd person singular active present of g1210 (δέω);