Strong’s Greek
G110 — athanasia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀθανασία
athanasia — pronounced ath-an-as-ee'-ah
from a compound of 1 (as a negative particle) and 2288; deathlessness:--immortality. see GREEK for 1 see GREEK for 2288
3 occurrences in the KJV.
1 Corinthians 15:53
For this corruptible must put on incorruption, and this mortal must put on immortality.
1 Corinthians 15:54
So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
1 Timothy 6:16
Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.