The Greek word "arche" appears in 56 passages in the New Testament. In the
majority of those passages the word means "beginning", and cults such as the
Jehovah's Witnesses have tried to apply this translation to Rev. 3:14 in 
such a way as to imply that Jesus was not pre-existent. However, "beginning"
is not a universal translation for the word "arche". Here are 11 passages
where "arche" does not mean "beginning" along with an alternate translation
of Rev. 3:14 taken from the New International Version, and finally a 
definition of "arche" taken from the authoritative Strong's Concordance:

"Now when they bring you to the synagogues and *magistrates* and 
authorities, do not worry about how or what you should answer, or what you 
should say.  --  Luke 12:11 (NKJV)

So they watched Him, and sent spies who pretended to be righteous, that they
might seize on His words, in order to deliver Him to the *power* and the 
authority of the governor.  --  Luke 20:20 (NKJV)

For I am persuaded that neither death nor life, nor angels nor 
*principalities* nor powers, nor things present nor things to come,  
--  Romans 8:38 (NKJV)

Then comes the end, when He delivers the kingdom to God the Father, when He
puts an end to all *rule* and all authority and power.  
--  1 Corinthians 15:24 (NKJV)

far above all *principality* and power and might and dominion, and every 
name that is named, not only in this age but also in that which is to come.
--  Ephesians 1:21 (NKJV)

to the intent that now the manifold wisdom of God might be made known by the
church to the *principalities* and powers in the heavenly places,  
--  Ephesians 3:10 (NKJV)

For we do not wrestle against flesh and blood, but against *principalities*,
against powers, against the rulers of the darkness of this age, against 
spiritual hosts of wickedness in the heavenly places.  
--  Ephesians 6:12 (NKJV)

For by Him all things were created that are in heaven and that are on earth,
visible and invisible, whether thrones or dominions or *principalities* or 
powers. All things were created through Him and for Him.  
--  Colossians 1:16 (NKJV)

and you are complete in Him, who is the head of all *principality* and 
power.  --  Colossians 2:10 (NKJV)

Having disarmed *principalities* and powers, He made a public spectacle of 
them, triumphing over them in it.  --  Colossians 2:15 (NKJV)

Remind them to be subject to *rulers* and authorities, to obey, to be ready 
for every good work,  --  Titus 3:1 (NKJV)

"To the angel of the church in Laodicea write: 'These are the words of the
Amen, the faithful and true witness, the *ruler* of God's creation.
--  Revelation 3:14 (NIV)


Strong's Exhaustive Concordance of the Bible; Greek reference # 746
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Arche - /ar-khay'/, from archomai (to commence); a commencement, or 
(concretely) cheif (in various applications of order, time, place or rank):
-- beginning, corner, (at the, the) first (estate), magistrate, power,
principality, principle, rule

                                                     God bless you!!!