Strong's #1519: eis (pronounced ice)
 a primary preposition; to or into (indicating the point reached or entered), of place, time, or (figuratively) purpose (result, etc.); also in adverbial phrases:--(abundant-)ly, against, among, as, at, (back-)ward, before, by, concerning, + continual, + far more exceeding, for (intent, purpose), fore, + forth, in (among, at, unto, -so much that, -to), to the intent that, + of one mind, + never, of, (up-)on, + perish, + set at one again, (so) that, therefore(-unto), throughout, til, to (be, the end, -ward), (here-)until(-to), ...ward, (where-)fore, with. Often used in composition with the same general import, but only with verbs (etc.) expressing motion (literally or figuratively).
Thayer's Greek Lexicon:
 ̓ 
 
  eis 
 
 1) into, unto, to, towards, for, among
 
  Part of Speech: preposition
Relation: a primary preposition
  Citing in TDNT: 2:420, 211
 
Usage:
This word is used 1705 times:
2 Peter 3:9: "count slackness; but is longsuffering  to us-ward, not willing"
2 Peter 3:9: "should perish, but that all should come  to repentance."
2 Peter 3:18: "both now and  forever. Amen."
1 John 2:17: "will of God abideth  forever."
1 John 3:8: "sinneth from the beginning.  For this purpose the Son of God"
1 John 3:14: "we have passed from death  unto life, because we love the"
1 John 4:1: "many false prophets are gone out  into the world."
1 John 4:9: "his only begotten Son  into the world, that we might live"
1 John 5:8: ""
1 John 5:10: "He that believeth  on the Son of God hath the witness"
1 John 5:13: "have I written unto you that believe  on the name of the Son"
1 John 5:13: "and that ye may believe  on the name of the Son"
2 John 1:2: "us, and shall be with us  forever."
2 John 1:7: "many deceivers are entered  into the world, who confess not"
2 John 1:10: "doctrine, receive him not  into your house, neither"
3 John 1:5: "faithfully whatsoever thou doest  to the brethren, and"
3 John 1:5: "to the brethren, and  to strangers;"
Jude 1:4: "men crept in unawares, who were before of old ordained  to this condemnation, ungodly men,"
Jude 1:4: "the grace of our God  into lasciviousness, and denying"
Jude 1:6: "chains under darkness  unto the judgment of the great day."
Jude 1:13: "the blackness of darkness  forever."
Jude 1:21: "Lord Jesus Christ  unto eternal life."
Jude 1:25: "both now and  ever. Amen."
Revelation 1:6: "be glory and dominion  forever and ever. Amen."
Revelation 1:11: "last: and, What thou seest, write  in a book, and"
Revelation 1:11: "seven churches which are in Asia;  unto Ephesus, and"
Revelation 1:11: "are in Asia; unto Ephesus, and  unto Smyrna, and"
Revelation 1:11: "Ephesus, and unto Smyrna, and  unto Pergamos, and"
Revelation 1:11: "Smyrna, and unto Pergamos, and  unto Thyatira, and"
Revelation 1:11: "Pergamos, and unto Thyatira, and  unto Sardis, and"
Revelation 1:11: "Thyatira, and unto Sardis, and  unto Philadelphia, and"
Revelation 1:11: "Sardis, and unto Philadelphia, and  unto Laodicea."
Revelation 1:18: "behold, I am alive  forevermore, Amen; and"
Revelation 2:10: "cast some of you  into prison, that ye may be tried; and"
Revelation 2:22: "I will cast her  into a bed, and them that commit adultery with"
Revelation 2:22: "them that commit adultery with her  into great tribulation, except they repent"
Revelation 4:9: "the throne, who liveth  forever and ever,"
Revelation 4:10: "the throne, and worship him that liveth  forever and ever,"
Revelation 5:6: "Spirits of God sent forth  into all the earth."
Revelation 5:13: "and unto the Lamb  forever and ever."
Revelation 5:14: "fell down and worshipped him that liveth  forever and ever."
Revelation 6:13: "stars of heaven fell  unto the earth, even as a fig tree"
Revelation 6:15: "free man, hid themselves  in the dens and in"
Revelation 6:15: "the dens and  in the rocks of the mountains;"
Revelation 7:12: "might, be unto our God  forever and ever. Amen."
Revelation 8:5: "altar, and cast  it into the earth: and there were"
Revelation 8:7: "with blood, and they were cast  upon the earth: and the"
Revelation 8:8: "burning with fire was cast  into the sea: and the"
Revelation 8:11: "of the waters became  wormwood; and many men"
Revelation 9:1: "fall from heaven  unto the earth: and to him"