Strong's #543: apeitheia (pronounced ap-i'-thi-ah)

from 545; disbelief (obstinate and rebellious):--disobedience, unbelief.

Thayer's Greek Lexicon:

̓́

apeitheia

1) obstinacy, obstinate opposition to the divine will

Part of Speech: noun feminine

Relation: from G545

Citing in TDNT: 6:11, 818

Usage:

This word is used 7 times:

 

Romans 11:30: "have now obtained mercy through their unbelief:"
Romans 11:32: "hath concluded them all in unbelief, that he might have mercy upon all."
Ephesians 2:2: "that now worketh in the children of disobedience:"
Ephesians 5:6: "upon the children of disobedience."
Colossians 3:6: "cometh on the children of disobedience:"
Hebrews 4:6: "and they to whom it was first preached entered not in because of unbelief:"
Hebrews 4:11: "the same example of unbelief."