flounder
From LSJ
Πολλὰ τὰ δεινὰ κοὐδὲν ἀνθρώπου δεινότερον πέλει → There are many wondrous things in this world, but none more wondrous than humans
English > Greek (Woodhouse)
verb intransitive
P. and V. κυλινδεῖσθαι. Ar. and V. κυλίνδεσθαι.
get out of one's depth: Met. P. βαπτίζεσθαι (Plato, Euthyd. 277D).