אַו
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 (Strong)
presumed to be the "constructive" or genitival form of -av; short for אַוַּת; desire (and so probably in Prov. 31:4); hence (by way of alternative) or, also if: also, and, either, if, at the least, X nor, or, otherwise, then, whether.
