- Original: σκληροκαρδία - Transliteration: Sklerokardia - Phonetic: sklay-rok-ar-dee'-ah - Definition: 1. hardness of heart - Origin: from a compound of G4642 and G2588 - TDNT entry: 13:13,4 - Part(s) of speech: Noun Feminine - Strong's: Feminine of a compound of G4642 and G2588 ; hard heartedness that is (specifically) destitution of (spiritual) perception: - hardness of heart. Total KJV Occurrences: 1 • heart, 1 Mar 16:14