ἐμπέλασις
From LSJ
ἐν δὲ τοῖς φυσικοῖς ἀεὶ οὕτως, ἂν μή τι ἐμποδίσῃ → in natural products the sequence is invariable, if there is no impediment | now with that which is natural it is always thus if there is no impediment
English (LSJ)
εως, ἡ,
A approaching, S.E.M.9.393, 11.98.