ἑκουσιασμός
From LSJ
καὶ νῦν ἀτεχνῶς ἐθέλω παρέχειν ὅ τι βούλει σοι, πλὴν κωλακρέτου γάλα πίνειν → and now I want to provide you with absolutely anything you want, except paymaster's milk to drink
English (LSJ)
ὁ,
A free-will offering, ib.2 Es.7.16, Aq.Jd.5.2, etc.
German (Pape)
[Seite 770] ὁ, freiwillige Handlung, LXX.