The spirit is indeed killed by sin (Eph 2:1); the spirit is then made alive again in regeneration (John 3:1-8; John 5:24-25; Eph 2:5-6 and elsewhere). The spirits of Adam and Eve died in day that they ate of the fruit of the tree of the knowledge of good and evil (Gen 2:17).
Well then, let's take a look at those verses.
Ephesians 2:1
And you were dead in your trespasses and sins,
The person was dead. No mention of their spirit being dead.
John 3:1-8
Now there was a man of the Pharisees, named Nicodemus, a ruler of the Jews; this man came to Jesus by night and said to Him, "Rabbi, we know that You have come from God
as a teacher; for no one can do these signs that You do unless God is with him." Jesus answered and said to him, "Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God." Nicodemus *said to Him, "How can a man be born when he is old? He cannot enter a second time into his mother's womb and be born, can he?" Jesus answered, "Truly, truly, I say to you, unless one is born of water and the Spirit he cannot enter into the kingdom of God. "That which is born of the flesh is flesh, and that which is born of the Spirit is spirit. "Do not be amazed that I said to you, 'You must be born again.' "The wind blows where it wishes and you hear the sound of it, but do not know where it comes from and where it is going; so is everyone who is born of the Spirit."
No mention of the word "
dead" at all. Definitely nothing stating the spirit is dead or killed.
John 5:24
Truly, truly, I say to you, he who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life.
Nothing. No mention of the word "dead," and nothing stating the spirit is killed or dead.
Ephesians 2:4-7
But God, being rich in mercy, because of His great love with which He loved us, even when we were dead in our transgressions, made us alive together with Christ (by grace you have been saved), and raised us up with Him, and seated us with Him in the heavenly
places in Christ Jesus, so that in the ages to come He might show the surpassing riches of His grace in kindness toward us in Christ Jesus.
There is the use of the word "dead," but it does not state the spirit is dead. It says the person, not the spirit is dead.
So, by my count, zero successes for five attempts. The notion of "
spiritual death" is not a term found anywhere in scripture. Used often. Almost always an abuse of scripture.
Now..... you want to give it one more try or concede the point: there is no scripture explicitly stating anyone's spirt has been killed by sin. The body without the spirit is dead (Jms. 2:26).