Greek Word Study · Strong’s G1163
δεῖ
dei · “be necessary”
Used 3 times across 3 books
Definition
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).
[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).
Where it appears
Luke1
Acts1
Hebrews1
In the text
Luke 18:1And he spake a parable unto them to this end, that men ought always to pray, and not to faint;Acts 1:16Men and brethren, this scripture must needs have been fulfilled, which the Holy Ghost by the mouth of David spake before concerning Judas, which was guide to them that took Jesus.Hebrews 2:1Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.
Lexicon data from STEPBible.org · CC BY 4.0 · Verse text KJV