praevalens
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.
prae-vălens: entis, Part. and P. a., from praevaleo.
prævălēns,¹⁴ tis (prævaleo), très vigoureux, très robuste : Vell. 2, 108, 2 || [fig.] Plin. 5, 84.