δρεπανη
From LSJ
ἔνδον σκάπτε, ἔνδον ἡ πηγή τοῦ ἀγαθοῦ καί ἀεί ἀναβλύειν δυναμένη, ἐάν ἀεί σκάπτῃς → Dig within. Within is the wellspring of Good; and it is always ready to bubble up, if you just dig. | Look within. Within is the fountain of the good, and it will ever bubble up, if thou wilt ever dig.
Greek (Liddell-Scott)
δρεπᾰνη: -φόρος, ον, φέρων δρέπανον ἢ ξίφος δρεπανοειδές, ἅρμα δ., ἔχον ἑκατέρωθεν δρέπανα, Λατ. currus falcatus, Ξεν. Ἀν. 1. 7, 10, κτλ.