clysterium
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
Latin > English (Lewis & Short)
clystērĭum: ii, n., = κλυστήριον>,
I a clyster (late Lat.), Scrib. Comp. 114; 118; Paul. ex Fest. p. 78, 13 Müll.