Feminine of a compound of G4642 and G2588; hard {heartedness} that {is} (specifically) destitution of (spiritual) perception: - hardness of heart.
Verse
Matrix
Luk 1:41And it came to pass, that, when Elisabeth heard the salutation of Mary, the babe leapedG4640 in her womb; and Elisabeth was filled with the Holy Ghost:
Luk 6:23Rejoice ye in that day, and leap for joyG4640: for, behold, your reward is great in heaven: for in the like manner did their fathers unto the prophets.