Strong's #615: apokteino (pronounced ap-ok-ti'-no)
 from 575 and kteino (to slay); to kill outright; figuratively, to destroy:--put to death, kill, slay.
Thayer's Greek Lexicon:
 ̓́ 
 
  apokteinō 
 
 1) to kill in any way whatever
 
 1a) to destroy, to allow to perish
 
 2) metaphorically to extinguish, abolish
 
 2a) to inflict mortal death
 2b) to deprive of spiritual life and procure eternal misery in hell
 
  Part of Speech: verb
Relation: from G575 and kteino (to slay)
 
Usage:
This word is used 75 times:
Acts 7:52: "fathers persecuted? and  they have slain them which showed before of the coming"
Acts 21:31: "And as they went about  to kill him, tidings came unto the chief captain"
Acts 23:12: "that they would neither eat nor drink till  they had killed Paul."
Acts 23:14: "We have bound ourselves under a great curse, that we will eat nothing until  we have slain Paul."
Acts 27:42: "counsel was to  kill the prisoners, lest any of them"
Romans 7:11: "and by it  slew"
Romans 11:3: "Lord,  they have killed thy prophets, and digged down thine altars;"
2 Corinthians 3:6: "of the spirit: for the letter  killeth, but the spirit"
Ephesians 2:16: "by the cross,  having slain the enmity thereby:"
1 Thessalonians 2:15: " Who both killed the Lord Jesus, and their own prophets,"
Revelation 2:13: "was my faithful martyr, who  was slain among you, where"
Revelation 2:23: "And  I will kill her children with death; and all"
Revelation 6:8: "fourth part of the earth,  to kill with sword, and with"
Revelation 6:11: "and their brethren, that should  be killed as they were,"
Revelation 9:5: "it was given that they should not  kill them, but that they should be tormented"
Revelation 9:15: "and a year, for to  slay the third part of men."
Revelation 9:18: "was the third part of men  killed, by the fire, and"
Revelation 9:20: "men which were not  killed by these plagues yet repented not"
Revelation 11:5: "he must in this manner  be killed."
Revelation 11:7: "shall overcome them, and  kill them."
Revelation 11:13: "in the earthquake  were slain of men seven thousand:"
Revelation 13:10: "into captivity: he that  killeth with the sword must be"
Revelation 13:10: "the sword must be  killed with the sword. Here is"
Revelation 13:15: "the image of the beast should  be killed."
Revelation 19:21: "And the remnant  were slain with the sword of him that sat"