δεῖdeî

also deon deh-on'; neuter active participle of the same; both used impersonally; it is (was, etc.) necessary (as binding)

Greek (New Testament) · G1163

Meanings

one must, it is necessary: with infinitive, Matthew 26:54, Mark 13:7, Acts 5:29, and elsewhere; with accusative et infinitive, Matthew 16:21, Mark 8:31, John 3:7, Acts 25:10, and elsewhere; with ellipse of accusative, Matthew 23:23; of accusative, and infinitive, Mark 13:14, Romans 1:27, Romans 8:26; οὐ (μὴ) δεῖ (non licet), ought not, must not: Acts 25:24, 2 Timothy 2:24; imperfect, ἔδει, of necessity or obligation in past time regarding a past event (Bl., § 63, 4), Matthew 18:33, Luke 15:32, John 4:4, Acts 27:21, and elsewhere; periphr., δέον ἐστίν (as in Attic, χρεών ἐστι = χρή, see δέον), Acts 19:36; id., with ellipse of ἐστίν, 1 Peter 1:6 τὰ μὴ δέοντα (= ἃ οὐ δεῖ 1 Timothy 5:13.

Synonyms

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 Hebrews 2:1, 1 John 2:6; Hort on James 3:10).

Same root

Where it appears

Appears 101 times in the Bible.

  • Matthew 16:21 From then on Jesus began to tell his disciples plainly that it was necessary for him to go to Jerusalem, and that he would suffer many terrible things at the hands of the elders, the leading priests, and the teachers of religious law. He would be killed, but on the third day he would be raised from the dead.
  • Matthew 17:10 Then his disciples asked him, “Why do the teachers of religious law insist that Elijah must return before the Messiah comes?”
  • Matthew 18:33 Shouldn’t you have mercy on your fellow servant, just as I had mercy on you?’
  • Matthew 23:23 “What sorrow awaits you teachers of religious law and you Pharisees. Hypocrites! For you are careful to tithe even the tiniest income from your herb gardens, but you ignore the more important aspects of the law—justice, mercy, and faith. You should tithe, yes, but do not neglect the more important things.
  • Matthew 24:6 And you will hear of wars and threats of wars, but don’t panic. Yes, these things must take place, but the end won’t follow immediately.
  • Matthew 25:27 why didn’t you deposit my money in the bank? At least I could have gotten some interest on it.’
See every passage

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.