πιστόω πιστόω, πιστός to make trustworthy, πιστοῦν τινα ὅρκοις to bind him by oaths, Thuc. Pass. to be made trustworthy, give a pledge or warrant, ὅρκῳ πιστωθῆναί τινι to bind oneself to another by oath, Od. to feel trust or confidence, i. e. to trust, to be persuaded, πιστωθῆναι ἐνὶ θυμῷ Od.; πιστωθεὶς ὅτι . . , feeling confidence that . . , Soph. Mid. to give mutual pledges of fidelity, exchange troth, χεῖράς τʼ ἀλλήλων λαβέτην καὶ πιστώσαντο Il.:— πιστοῦσθαί τινα ὑφʼ ὅρκου to secure his good faith by oaths, Soph. to confirm, prove, make good, guarantee, τι Polyb., Luc.