αὐτοματισμός
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
ὁ,
A that which happens of itself, chance, Hp.Acut. (Sp.) 57, Alcid.Soph. 25 (pl.), D.H.1.4, J.AJ10.11.7; κατ' αὐτοματισμόν Phleg.Mir.1.