אַו
From LSJ
Δρυὸς πεσούσης πᾶς ἀνὴρ ξυλεύεται → Quercu cadente, nemo ignatu abstinet → Fiel erst die Eiche, holt ein jeder Mann sich Holz
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.
