δεῖ
English (LSJ)
subj. δέη, sts. contr. δῆ (in codd. of Com., as Ar.Ra.265);
A ὁπόσου κα δῆ IG4.1484.65 (Epid.), cf. SIG245G47 (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.—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. <μ'> ἐλθεῖν Pi.O.6.28, etc.: with nom. of the Pron., ἡγούμην . . δεῖν . . μεγαλοψυχότερος φαίνεσθαι D.19.235: rarely δεῖ σ' ὅπως δείξεις, = δεῖ σε δεῖξαι, S.Aj.556, cf.Ph.54; δεῖ σ' 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, καθ' 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.OT825; for οἴομαι δεῖν, v. οἴομαι. 3 abs. with inf. understood, μὴ πεῖθ' ἃ μὴ δεῖ (sc. πείθειν) S.OC1442, cf. OT1273; εἴ τι δέοι, ἤν τι δέῃ (sc. γενέσθαι), X. Mem.1.2.59, Th.1.44; κἂν δέῃ (sc. τροχάζειν), τροχάζῶ 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 ταῦτ' 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 βραχἔ ἐμοὶ δεῖσθαι φράσαι S.OC570 (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.ND17. 2 Subst. δέον, τό (v. sub voc.).