ἀρχάγγελοςarchángelos

Same root

• ἄρχωárchō · G757to be first (in political rank or power)
• ἄγγελοςángelos · G32compare G34 (ἀγέλη)) (to bring tidings); a messenger; especially an "angel"; by implication, a pastor

Where it appears

Appears 2 times in the Bible.

• 1 Thessalonians 4:16 For the Lord himself will come down from heaven with a commanding shout, with the voice of the archangel, and with the trumpet call of God. First, the believers who have died will rise from their graves.
• Jude 1:9 But even Michael, one of the mightiest of the angels, did not dare accuse the devil of blasphemy, but simply said, “The Lord rebuke you!” (This took place when Michael was arguing with the devil about Moses’ body.)