philosophaster
From LSJ
εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
Latin > English (Lewis & Short)
phĭlŏsŏphaster: tri, m. philosophus,
I a bad philosopher, a philosophaster, Aug. Civ. Dei, 2, 27 dub.
Latin > French (Gaffiot 2016)
phĭlŏsŏphastĕr, trī, m., prétendu philosophe : Aug. Civ. 2, 27.