KJV - Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:

ASV - without understanding, covenant-breakers, without natural affection, unmerciful:

BBE - Without knowledge, not true to their undertakings, unkind, having no mercy:

WEB - without understanding, covenant-breakers, without natural affection, unforgiving, unmerciful;

YLT - unintelligent, faithless, without natural affection, implacable, unmerciful;

Notes