αὐτοκέλευστος
From LSJ
καὶ λέγων ὅτι Πεπλήρωται ὁ καιρὸς καὶ ἤγγικεν ἡ βασιλεία τοῦ θεοῦ· μετανοεῖτε καὶ πιστεύετε ἐν τῷ εὐαγγελίῳ → declaring “The time has been accomplished and the kingdom of God is near: start repenting and believing in the gospel!” (Μark 1:15)
English (LSJ)
ον,
A self-bidden, i. e. unbidden, X.An.3.4.5, D.H.8.66, AP5.21 (Rufin.); προθυμία Ph.2.90, al. Adv. -τως Aristeas 92.
German (Pape)
[Seite 398] auf eigenen Befehl, also ungeheißen, von selbst, Xen. An. 3, 4, 5 u. Sp., wie Dion. Hal. 8, 66.