ἀσύνετοςasýnetos

Same root

• ΑA · G1the first letter of the alphabet; figuratively, only (from its use as a numeral) the first:
• συνετόςsynetós · G4908mentally put (or putting) together, i.e. sagacious

Where it appears

Appears 5 times in the Bible.

• Matthew 15:16 “Don’t you understand yet?” Jesus asked.
• Mark 7:18 “Don’t you understand either?” he asked. “Can’t you see that the food you put into your body cannot defile you?
• Romans 1:21 Yes, they knew God, but they wouldn’t worship him as God or even give him thanks. And they began to think up foolish ideas of what God was like. As a result, their minds became dark and confused.
• Romans 1:31 They refuse to understand, break their promises, are heartless, and have no mercy.
• Romans 10:19 But I ask, did the people of Israel really understand? Yes, they did, for even in the time of Moses, God said, “I will rouse your jealousy through people who are not even a nation. I will provoke your anger through the foolish Gentiles.”