μυριονταδικός
From LSJ
Φύσιν πονηρὰν μεταβαλεῖν οὐ ῥᾴδιον → Haud facile commutatur ingenium malum → Verdorbene Natur zu ändern ist nicht leicht
English (LSJ)
ή, όν,
A of the number 10,000: μ. διπλοῦς, τριπλοῦς, etc. (sc. ἀριθμός), a unit of the second (third, etc.) order of myriads (= 10,0002, 10,0003, etc.), Theo Sm.in Ptol.p.64 H.