μέλλωméllō

to be about to be or do

Greek (New Testament) · G3195

Meanings

1. with infinitive

(a) of intending or being about to do of one's own free will: with infinitive praes., Matthew 2:13, Luke 10:1, Acts 3:3, Acts 5:35, Hebrews 8:5, 2 Peter 1:12, and elsewhere; with infinitive aorist (Bl., § 58, 3), Acts 12:6, Revelation 3:16

(b) of compulsion, necessity or certainty: with infinitive praes., Matthew 16:27, Luke 9:31, John 6:71, Romans 4:24, and elsewhere; with infinitive aorist, Romans 8:18, Galatians 3:23, Revelation 3:2, Revelation 12:4.

2. Ptcp., ὁ μέλλων: absolutely, Romans 8:38, 1 Corinthians 3:22; τὰ μ., Colossians 2:17; εἰς τὸ μ.; with as a noun, Matthew 3:7, Matthew 12:32 (ὁ αἰὼν ὁ μ.; LXX for עַד), Acts 24:25, 1 Timothy 4:8, Hebrews 2:5, and elsewhere

Appears 109 times in the Bible.

Matthew 2:13 After the wise men were gone, an angel of the Lord appeared to Joseph in a dream. “Get up! Flee to Egypt with the child and his mother,” the angel said. “Stay there until I tell you to return, because Herod is going to search for the child to kill him.”
Matthew 3:7 But when he saw many Pharisees and Sadducees coming to watch him baptize, he denounced them. “You brood of snakes!” he exclaimed. “Who warned you to flee the coming wrath?
Matthew 11:14 And if you are willing to accept what I say, he is Elijah, the one the prophets said would come.
Matthew 12:32 Anyone who speaks against the Son of Man can be forgiven, but anyone who speaks against the Holy Spirit will never be forgiven, either in this world or in the world to come.
Matthew 16:27 For the Son of Man will come with his angels in the glory of his Father and will judge all people according to their deeds.
Matthew 17:12 But I tell you, Elijah has already come, but he wasn’t recognized, and they chose to abuse him. And in the same way they will also make the Son of Man suffer.”

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