KJV:
Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:
NASB:
without understanding, untrustworthy, unloving, unmerciful;
KJV:
For he shall have judgment without mercy, that hath shewed no mercy; and mercy rejoiceth against judgment.
NASB:
For judgment will be merciless to one who has shown no mercy; mercy triumphs over judgment.