despiadado
From LSJ
Ὁ δὲ μὴ δυνάμενος κοινωνεῖν ἢ μηδὲν δεόμενος δι' αὐτάρκειαν οὐθὲν μέρος πόλεως, ὥστε ἢ θηρίον ἢ θεός → Whoever is incapable of associating, or has no need to because of self-sufficiency, is no part of a state; so he is either a beast or a god
Spanish > Greek
ἀνελεεινός, ἀπηλεγής, ἀφιλοικτίρμων, ἀνοίκτειρος, ἀνίλεως, ἀνηλεής, ἀδυσώπητος, ἀναιδής, ἀνηλέητος, ἀνελεήμων