operōsus adj. with comp. opera, full of labor, painstaking, active, busy, industrious, laborious: senectus: vates operose dierum, in regard to, O.

—Of a medicine, efficacious, drastic: herbae, O.

—Costing trouble, troublesome, toilsome, difficult, elaborate: labor: artes, handicrafts: opus: res, L.: mundi moles, artfully constructed, O.: carmina, H.: sepulcrum operosius, quam quod decem homines effecerint triduo: Divitiae, H.