διετηρίς
From LSJ
ἆρά γε λόγον ἔχει δυοῖν ἀρχαῖν, ὑλικῆς τε καὶ δραστικῆς → does it in fact have the function of two principles, the material and the active?
English (LSJ)
ίδος, ἡ, (διετής)
A space of two years, LXX 2 Ki.13.23, IGRom.4.850 (Laodicea ad Lycum).
Greek (Liddell-Scott)
διετηρίς: -ίδος, ἡ, (διετὴς) διάστημα δύο ἐτῶν, Ἑβδ. (2 Βασιλ. ιγ΄, 23).