δεῖ

δεῖ: subj. δέη, sts. contr. δῆ (in codd. of Com., as Ar. Ra. 265); ὁπόσου κα δῆ IG 4.1484.65 (Epid.), cf. SIG 245G 47 (Delph.); opt. δέοι Th. 4.4; inf. δεῖν; part. δέον (v. infr. IV): impf. ἔδει, Ion. ἔδεε: fut. δεήσει E. Hipp. 941, etc.: aor. I ἐδέησε Th. 2.77, etc.

• Α—Impers. from δέω (A), there is need (the sense of moral obligation, prop. belonging to χρή, is later, S. Ph. 583, etc.):
• • I c.acc.pers.et inf., it is needful for one to do, one must, once in Hom., τί δὲ δεῖ πολεμιζέμεναι . . Ἀργείους why need the Argives fight? Il. 9.337; δ. <μʼ> ἐλθεῖν Pi. O. 6.28, etc.: with nom. of the Pron., ἡγούμην . . δεῖν . . μεγαλοψυχότερος φαίνεσθαι D. 19.235: rarely δεῖ σʼ ὅπως δείξεις, = δεῖ σε δεῖξαι, S. Aj. 556, cf. Ph. 54; δεῖ σʼ ὅπως μηδὲν διοίσεις Cratin. 108; (the full constr. in S. Ph. 77 τοῦτο δεῖ σοφισθῆναι . . ὅπως γενήσῃ): rarely c. dat. pers., there is need of . . for . ., θεοῖσι προσβαλεῖν χθονὶ ἄλλην δεήσει γαῖαν E. Hipp. 941, cf. X. An. 3.4.35, Oec. 7.20: the acc. pers. is often omitted, ἐκ τῶν μανθάνειν δεῖ (sc. ἡμᾶς) Hdt. 1.8, cf. A. Ag. 567, Eu. 826, etc.
  • • 2 c. acc. rei et inf., δεῖ τι γενέσθαι Th. 5.26; παραδείγματα, καθʼ ἃ δέοι ἀποκρίνεσθαι Pl. Men. 79a, etc.; also ἐπεὶ δέ οἱ ἔδεε κακῶς γενέσθαι since it was fated for him . ., since he was doomed . ., Hdt. 2.161, cf. 8.53, 9.109, S. OT 825; for οἴομαι δεῖν, v. οἴομαι.
    • 3 abs. with inf. understood, μὴ πεῖθʼ ἃ μὴ δεῖ (sc. πείθειν) S. OC 1442, cf. OT 1273; εἴ τι δέοι, ἤν τι δέῃ (sc. γενέσθαι), X. Mem. 1.2.59, Th. 1.44; κἂν δέῃ (sc. τροχάζειν), τροχάζω Philetaer. 3.
  • II c. gen. rei, there is need of, freq. with neg., οὐδὲν ἂν δέοι πολλοῦ ἀργυρίου Pl. Cri. 45a, etc.; τί δεῖ τῆς ἀρετῆς; Arist. Pol. 1309b10; sts. with inf. added, μακροῦ λόγου δεῖ ταῦτʼ ἐπεξελθεῖν A. Pr. 870, cf. 875, Supp. 407.
  • • • b freq. in phrases, πολλοῦ δεῖ there wants much, far from it, ὀλίγου δεῖ there wants little, all but; in full c. inf., πολλοῦ δεῖ οὕτως ἔχειν Pl. Ap. 35d; τοὺς Πλαταιέας ἐλαχίστου ἐδέησε διαφθεῖραι [τὸ πῦρ] Th. 2.77; πολλοῦ γε δεῖ, πολλοῦ γε καὶ δεῖ Ar. Ach. 543, D. 18.300, 21.71; τοῦ πλεῦνος αἰεὶ ἔδεε there was always further to travel, Hdt. 4.43; τοῦ παντὸς δεῖ Luc. Merc.Cond. 13: also ὀλίγου δεῖν abs., in same sense, Pl. Ap. 22a, etc.; μικροῦ δεῖν D. 27.29.
    • 2 with dat. pers. added, δεῖ μοί τινος A. Ag. 848, E. Med. 565, Th. 1.71, etc.
    • 3 with acc. pers. added, αὐτὸν γάρ σε δεῖ προμηθέως A. Pr. 86, cf. E. Rh. 837, Hipp. 23.
    • 4 rarely with Subj. in nom., δεῖ μοί τι something is needful to me, ἓν δεῖ μόνον μοι E. Supp. 594; εἴ τι δέοι τῷ χορῷ Antipho 6.12; πρῶτον μὲν τοῦτο δεῖ, ὑπειληφέναι . . D. 10.15.
  • III Med., δεῖται there is need, c. gen., δεῖταί σοι τῆς αὐτῆς ἐρωτήσεως Pl. Men. 79c; ὅσων δέοιτο Aen.Tact. 13.1; ἑτέρου δεῖσθαι στρατηγοῦ νομίζων Plu. Pel. 26: c. inf., ὥστε βραχέʼ ἐμοὶ δεῖσθαι φράσαι S. OC 570 (codd.); δεήσεται . . ἀναγράφεσθαι Aen.Tact. 31.9; τήν μευ γλῶσσαν ἐκτεμεῖν δεῖται Herod. 6.41.
  • IV neut. part. δέον ( δεῖν is dub. in Ar. Fr. 220, Lys. 14.7, cf. A.D. Adv. 132.30, Hdn.Gr. 2.328, al., Hsch.): abs., it being needful or fitting, Pl. Prt. 355d, etc.; οὐκ ἀπήντα, δέον, he did not appear in court, though he ought to have done so, D. 21.90: c. inf., Ar. Nu. 988; οὐδὲν δέον there being no need, Hdt. 3.65, etc.: fut. ὡς αὐτίκα δεῆσον διώκειν X. Cyr. 3.2.8: aor. δεῆσαν Plu. Fab. 9, etc.: also δέον ἂν εἴη, = δέοι ἄν, Plb. 2.37.5, etc.: less freq. gen. abs. δέοντος, c. acc. inf., Corn. ND 17.
  • • 2 Subst. δέον, τό (v. sub voc.).

δεῖ, s. δέω².

δεῖ

[prob. fr. δέω.]

It is binding on (one), behoves (one).

With acc. and infin.: τί δεῖ πολεμιζέμεναι Τρώεσσιν Ἀργείους; Il. 9.337.

δεῑ impers.

• 1it is necessary πρὸς Πιτάναν δὲ πὰρ Εὐρώτα πόρον δεῖ σάμερον ἐλθεῖν ἐν ὥρᾳ (cf. χρή, v. 27) O. 6.28

δεῖ (δέω): τί δὲ δεῖ πολεμιζέμεναι Τρώεσσιν| Ἀργείους; ‘Why should the Greeks be warring with the Trojans?’ Il. 9.337. Elsewhere χρή in Homer.

δεῖ from δέω, to bind

• • Ic. acc. pers. et inf., δεῖ τινὰ ποιῆσαι it is binding on one to do a thing, one must, one ought, Lat. oportet, Hom., etc.:—rarely, δεῖ σε ὅπως δείξεις δεῖ σε δεῖξαι, Soph.: —rarely also c. dat. pers. et inf., there is need for one to do, δεῖ τινὶ ποιήσαι Eur., Xen.
  • • 2c. acc. rei et inf., δεῖ τι γενέσθαι Thuc., etc.:—for the phrase οἴομαι δεῖν, v. οἴομαι:— when used absol., an inf. may be supplied, μὴ πεῖθʼ ἃ μὴ δεῖ (sc. πείθειν) Soph., etc.
  • II(from δέω, to want), c. gen. rei, there is need of, there is wanting, Lat. opus est re, οὐδὲν δεῖ τινός Hdt., Attic:—phrases, πολλοῦ δεῖ there wants much, far from it; ὀλίγου δεῖ there wants little, all but:— in answers, πολλοῦ γε δεῖ, πολλοῦ γε καὶ δεῖ far from it, Ar., Dem.; πλεῦνος δεῖ it is still further from it, Hdt:— ὀλίγου δεῖν absol., in same sense, Plat.; μικροῦ δεῖν Dem.
  • • 2with a dat. pers. added, δεῖ μοί τινος, Lat. opus est mihi re, Aesch., Thuc., etc.
    • 3with acc. pers. added, δεῖ σε προμηθέως Aesch.
  • IIIneut. part. δέον, contr. δεῖν, absol., like ἐξόν, παρόν it being needful, quum oporteret, Plat.; οὐκ ἀπήντα, δέον, he did not appear in court, though he ought to have done so, Dem.; so, οὐδὲν δέον there being no need, Hdt.
  • IIfor δέον, τό, as Subst., v. sub voce.