ἑκουσιαστί

From LSJ

ἐπὶ πολλῆς ἡσυχίας καὶ ἠρεμίας ὑμῶν → leaving you entirely at rest

Source

German (Pape)

[Seite 770] = ἑκοντί, Sp.

Spanish (DGE)

adv. voluntariamente Afric.Chron.M.10.81A.