ἀπέλεθρος
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)
ον,
A immeasurable, ἶν' ἀπέλεθρον ἔχοντας Il.5.245, cf. Od. 9.538; ἀπέλεθρον ἀνέδραμε sprang back immeasurably, Il.11.354; countless, Nonn.D.19.330.