Lewis & Short

căvilla, ae, f. dim. [perh. for calvilla, from calvor; but cf. Sanscr. kava, stingy], a jeering, raillery, scoffing (ante- and postclass., and very rare): aufer cavillam: non ego nunc nugas ago, * Plaut. Aul. 4, 4, 11; Mart. Cap. 4, § 423.
Access. form căvil-lum, i, n., App. M. 1, p. 105; Aur. Vict. Epit. 9; cf. Paul. ex Fest. p. 46 Müll.