δεῖ

δεῖ impersonal (δέω),

[in LXX chiefly for infin. with לְ ;]

one must, it is necessary: with inf., Matt 26,54, Mark 13,7, ApG 5,29, al.; with accusative and inf., Matt 16,21, Mark 8,31, Joh 3,7, ApG 25,10, al.; with ellipse of accusative, Matt 23,23 of accusative, and inf., Mark 13,14, Rom 1,27; 8,26; οὐ (μὴ) δεῖ (non licet), ought not, must not: ApG 25,24, 2 Tim 2,24; impf., ἔδει, of necessity or obligation in past time regarding a past event (Bl., § 63, 4), Matt 18,33, Luk 15,32, Joh 4,4, ApG 27,21, al.; periphr., δέον ἐστίν (as in Attic, χρεών ἐστι = χρή, see: δέον), ApG 19,36 id., with ellipse of ἐστίν, 1 Pet 1,6 τὰ μὴ δέοντα (= ἃ οὐ δεῖ 1 Tim 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 Hebr 2,1, 1 Joh 2,6; Hort on Jak 3,10).