Strong's #4641: sklerokardia (pronounced sklay-rok-ar-dee'-ah)

feminine of a compound of 4642 and 2588; hard-heartedness, i.e. (specially), destitution of (spiritual) perception:--hardness of heart.

Thayer's Greek Lexicon:

́

sklērokardia

1) hardness of heart

Part of Speech: noun feminine

Relation: from a compound of G4642 and G2588

Citing in TDNT: 3:613, 415

Usage:

This word is used 3 times:

 

Matthew 19:8: "Moses because of the hardness of your hearts suffered you to put away"
Mark 10:5: "unto them, For the hardness of your heart he wrote you this"
Mark 16:14: "them with their unbelief and hardness of heart, because they believed not them which had seen"