Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
plācātĭo: ōnis, f. placo,
I a pacifying, appeasing, propitiating: deorum immortalium, Cic. N. D. 3, 2, 5; id. Tusc. 4, 28, 60.
plācātĭō, ōnis, f. (placo), action d’apaiser, de fléchir : Cic. Nat. 3, 5 ; Tusc. 4, 60.