Strong’s Greek
G52 — agnoia
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἄγνοια
agnoia — pronounced ag'-noy-ah
from 50; ignorance (properly, the quality):--ignorance. see GREEK for 50
4 occurrences in the KJV.
Acts 3:17
And now, brethren, I wot that through ignorance ye did it, as did also your rulers.
Acts 17:30
And the times of this ignorance God winked at; but now commandeth all men every where to repent:
Ephesians 4:18
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
1 Peter 1:14
As obedient children, not fashioning yourselves according to the former lusts in your ignorance: