αὖ
αὖ
again, anew, afresh, once more, Hom., etc.; after numerals, δεύτερον αὖ, τρίτον αὖ, etc., Hom.
generally, again, i. e. further, moreover, besides, Lat. porro, Od., Attic
in turn, on the other hand, following δέ, Il., Attic.
the pleon. phrases, πάλιν αὖ, αὖ πάλιν, ἔμπαλιν αὖ, αὖθις αὖ, αὖθις αὖ πάλιν, are only Attic, mostly Trag.