δεκάπαλαι
From LSJ
τεκμαιρόμενοι προκατηγορίας οὐ προγεγενημένης → deducing from the fact that there was no previous accusation
English (LSJ)
[κᾰ], Adv.
A a very long time ago, Com. form of πάλαι (cf. δωδεκάπαλαι), Ar.Eq.1154, Philonid.8, Henioch.2.1.