δεκαετής
From LSJ
Θνητὸς πεφυκὼς τοὐπίσω πειρῶ βλέπειν → Homo natus id, quod instat, ut videas, age → Als sterblich Wesen mühe dich zu seh'n, was folgt
English (LSJ)
ές, or δεκα-έτης, ες,
A ten years old, Hdt.1.114, Hp.Epid.1.10. II of or lasting ten years, πόλεμος Th.5.25,26 codd., Jul.Or.2.74b. (Cf. δεκέτης.) — The statements of Gramm. as to the accentuation of this and similar words are confused, cf.Poll.1.54, EM765.21, Choerob.in Theod.1.167, 2.385: they were prob. parox. in Attic, oxyt. in the κοινή.