geluidloos
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
ἤρεμος, ἥσυχος, ἅσυχος, ἡσυχαῖος, ἡσύχιος, γαληνός, ἠρεμαῖος, ἀτρεμής, σιγηλός, σιωπηλός, κωφός