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From LSJ
οὐκ ἔστι λέουσι καὶ ἀνδράσιν ὅρκια πιστά → there are no pacts between lions and men, between lions and men there are no oaths of faith, there can be no covenants between men and lions
Spanish > Greek
ἀζηχής, ἀμήχανος, ἀμίμητος, ἀντίτυπος, ἀνύπεικτος, ἄπορος, ἀργαλέος, ἀσκελής, δυσέκνιπτος, δυσεργής, δύσεργος, δυσήνιος, δυσήρης, δύσθετος, δύσκολος, δυσμαρής, δύσμαχος, δυσμεταχείριστος, δυσμήχανος, δυσπετής, δύστοπος, δυσχερής, δύσχρηστος