δεκάχρονος
From LSJ
Ἕκτορ νῦν σὺ μὲν ὧδε θέεις ἀκίχητα διώκων → Hector, you run in pursuit of something unattainable | Hector, now art thou hasting thus vainly after what thou mayest not attain | Hector, now you are hasting thus vainly after what you may not attain
Spanish (DGE)
-ον
métr. de diez unidades de tiempo μολοσσοσπονδεῖος ἐκ πέντε μακρῶν δ. Anecd.Stud.1.235.