serrula
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.
serrŭla: ae, f.
dim. id.,
I a small saw: dentata, Cic. Clu. 64, 180: ferrea, Varr. R. R. 1, 50, 2: aliquid ossis serrulā praecidere, Cels. 7, 33: vitem serrulā desecare, Col. Arb. 6, 4: manubriata, Pall. 1, 43, 2.