σκληροκαρδία

Derivation

feminine of a compound of G4642 (σκληρός) and G2588 (καρδία);

Meaning

hard-heartedness, i.e. (specially), destitution of (spiritual) perception

In the King James Version

hardness of heart

Translated as

hardness (2), heart (2), hearts (1)

Where it appears

Found in 3 verses

Matthew

19:8

Mark

10:5, 16:14