κατακρήμναμαι
From LSJ
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
English (LSJ)
Pass.,
A = κατακρέμαμαι, Hp.Morb.2.10, Ar.Nu. 377: impf. κατεκρημνῶντο (from κατακρεμ-κρημνάομαι) h.Bacch.39, prob. in Dsc.4.46, J.AJ3.7.5.