G4643 σκληρότης
sklērótēs — callousness, i.e. (figuratively) stubbornness
KJV: hardness
Derived from σκληρός sklērós (dry, i.e. hard or tough)
Occurs 5 times. Every verse with this word
Where it occurs
- Romans 2:5 — But according to your hardness and unrepentant heart you are treasuring up for yourself wrath in the day of wrath…