ὀρθοῦσθαι
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
Greek > English (Woodhouse Verbs Reversed)
(see also ὀρθόω): succeed, arise from sitting, come right, get up from sitting, stand upright