Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:
Berean Study Bible (BSB) - Romans 1:31 >They are senseless, faithless, heartless, merciless.
Textus Receptus (TR) - Romans 1:31 >ἀσυνέτους, ἀσυνθέτους, ἀστόργους, ἀσπόνδους, ἀνελεήμονας·