Romans 1:31

Without understanding ,.... Of God, of his nature and worship, of things divine and even moral, being given up to a reprobate mind:

covenant breakers ; had no regard to private or public contracts:

without natural affection ; to their parents, children, relations and friends:

implacable ; when once offended there was no reconciling of them:

unmerciful ; had no pity and compassion to persons in distress.