beginning, corner, (at the, the) first (estate), magistrate, power, principality, principle, rule

“Estate” From Boyd’s Bible Dictionary:

(standing). In Mark 6:21²¹And when a convenient day was come, that Herod on his birthday made a supper to his lords, high captains, and chief estates of Galilee; (Mark 6:21), a class or order representing the government. The “estate of the elders,” Acts 22:5⁵As also the high priest doth bear me witness, and all the estate of the elders: from whom also I received letters unto the brethren, and went to Damascus, to bring them which were there bound unto Jerusalem, for to be punished. (Acts 22:5), was a body of advisers cooperating with the Sanhedrim.

“Principality” From Boyd’s Bible Dictionary:

Territory of a prince

Seemingly an order of angels (Eph. 1:21; 6:12²¹Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come: (Ephesians 1:21)
¹²For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. (Ephesians 6:12); Col. 1:16; 2:10¹⁶For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: (Colossians 1:16)
¹⁰And ye are complete in him, which is the head of all principality and power: (Colossians 2:10)).

Concise Bible Dictionary:

The status of those who hold the first place, as rulers among men (Titus 3:1¹Put them in mind to be subject to principalities and powers, to obey magistrates, to be ready to every good work, (Titus 3:1)); but the word especially refers to the spiritual high powers in the unseen world, whether good or bad. They were created by the Lord, and He is head of them all (col. 1:16¹⁶For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him: (Colossians 1:16); Col. 2:10¹⁰And ye are complete in him, which is the head of all principality and power: (Colossians 2:10)). Some fell from the position of trust given them: they kept not their first estate or principality (Jude 6⁶And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day. (Jude 6)). Others contend against the heavenly position of the saints (Eph. 6:12¹²For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. (Ephesians 6:12)). The Lord “spoiled” principalities on the cross (col. 2:15¹⁵And having spoiled principalities and powers, he made a show of them openly, triumphing over them in it. (Colossians 2:15)); and at His resurrection He was exalted by God far above all such created powers (Eph. 1:21²¹Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come: (Ephesians 1:21); Eph. 3:10¹⁰To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God, (Ephesians 3:10)).

Strong’s Dictionary of Greek Words:

Number:

746 (find all occurrences in KJV Bible)

Greek:

ἀρχή

Transliteration:

arche

Phonic:

ar-khay’

Meaning:

from 756; (properly abstract) a commencement, or (concretely) chief (in various applications of order, time, place, or rank)

KJV Usage:

beginning, corner, (at the, the) first (estate), magistrate, power, principality, principle, rule