(adj.adv.) : ŏpĕrōsus, a, um, adj.opera.
* Taking great pains, painstaking, active, busy, industrious, laborious (class.; syn.: laboriosus, industrius): senectus, opp. to languida atque iners,Cic. Sen. 8, 26: colonus,Ov. Nuce, 57: cultibus ambae,id. Am. 2, 10, 5. —Poet. with Gr. acc.: Cynthia non operosa comas (al. comis),Prop. 5, 8, 52.—Poet. with gen.: vates operose dierum,in regard to,Ov. F. 1, 101.—Sup.: Syria in hortis operosissima,exceedingly industrious in gardening,Plin. 20, 5, 16, § 33.
* Transf., of a medicine, active, efficacious, powerful, drastic (poet.): herbae,Ov. M. 14, 22.
* That costs much trouble, troublesome, toilsome, laborious, difficult, elaborate (syn. difficilis): labor operosus et molestus,Cic. N. D. 2, 23, 59: artes,handicrafts,id. Off. 2, 5, 17: opus,id. Q. Fr. 2, 14, 1: res,Liv. 4, 8: templa,costly, sumptuous,Ov. M. 15, 667: moles mundi,the artfully constructed fabric of the universe,id. ib. 1, 258: castaneae cibo,hard to digest,Plin. 15, 23, 25, § 93: carmina,elaborate,Hor. C. 4, 2, 31.—Comp.: ne quis sepulcrum faceret operosius, quam quod decem homines effecerint triduo,Cic. Leg. 2, 26, 64: divitiae operosiores,Hor. C. 3, 1, 48; 3, 12, 5.—Hence, adv.: ŏpĕrōsē.
* Lit., with great labor or pains, laboriously, carefully (class.): nec flat operose,Cic. Or. 44, 149: vina condita, Ov F. 5, 269.—Comp.: dicemus operosius,more precisely,Plin. 18, 26, 65, § 238.
* Transf., exactly, accurately (post-Aug.): dicemus mox paulo operosius,Plin. 18, 26, 65, § 238.

s. TLL