- Original: σκληρύνω - Transliteration: Skleruno - Phonetic: sklay-roo'-no - Definition: 1. to make hard, harden 2. metaph. a. to render obstinate, stubborn b. to be hardened c. to become obstinate or stubborn - Origin: from G4642 - TDNT entry: 22:10,8 - Part(s) of speech: Verb - Strong's: From G4642 ; to indurate that is (figuratively) render stubborn: - harden. Total KJV Occurrences: 6 • harden, 3 Hebrews 3:8; Hebrews 3:15; Hebrews 4:7 • hardened, 2 Act 19:9; Hebrews 3:13 • hardeneth, 1 Romans 9:18