Lewis Short
(adverb) : magnŏpĕrē (so written by Plaut., Caes., Liv., and Sen., but ap. Ter., Cic., Plin. H. N., the best MSS. and edd. have magnō opĕre; cf.
* Ellendt,Cic. de Or. 1, 35, 164; Osann,Cic. Rep. 1, 8, 13), magnus-opus, with great labor; hence, in gen., very much, greatly, exceedingly, particularly, earnestly.
* With verbs and verbal adjj., etc. (class.): edictum est magnopere mihi, ne, etc.,Plaut. Pers. 2, 2, 59: L. Gellius philosophis magno opere auctor fuit, ut, etc.,Cic. Leg. 1, 20, 53: ego tibi Romam properandum, magno opere censeo,id. Fam. 15, 14, 4; id. de Or. 2, 86, 353: desidero,id. Sen. 13, 44: nullā magnopere clade acceptā,Liv. 3, 26.—Esp., with words denoting mental action, as velle, petere, orare, hortari, desiderare, mirari, etc., strongly, vehemently, with all one's heart, zealously: hoc etiam magnopere oravit, ut, etc.,Suet. Ner. 57: magno opere velle,Cic. Fam. 2, 6, 1: magnopere cohortatus,Caes. B. G. 2, 5: suadere,Liv. 3, 71, 8: desiderare,Cic. Lael. 13, 44: mirari,id. Off. 2, 16, 56; so with putare, censere, providere, etc., strongly, earnestly: putare,id. Fam. 6, 13, 12: censeo,id. ib. 15, 14, 6; Liv. 3, 18, 3: quā de re, judices, vobis magno opere providendum est,Cic. Verr. 2, 2, 10, § 28; cf.: nulla magno opere expectatio est, no very great, Cael. ap. Cic. Fam. 8, 1.—In tmesi: magnoque opere abs te peto, cures, ut, etc.,Cic. Fam. 13, 34. —In the contrary order: opere magno edicite, ut etc., Att. ap. Non. 357, 13 (Trag. Rel. v. 508 Rib.).—In comp.: quo majore opere dico suadeoque, uti, etc., the more, Cato ap. Gell. 7, 3, 4.—In sup.: meministin' mihi te maximopere dicere?Ter. Heaut. 4, 1, 13: a te maximo opere etiam atque etiam quaeso et peto, ut, etc.,most particularly,Cic. Fam. 3, 2, 1: maximopere indigne ferens,Liv. 42, 57.—In tmesi: Thais maximo te orabat opere, Ter. Eun. 3, 3, 26.—In inverted order: rogare jussit te opere maximo,Plaut. Stich. 1, 3, 94: nos ambo opere maximo dabamus operam, ut, etc.,Ter. Phorm. 5, 1, 33.
* With adjectives = valde (very rare): id ego Tadio et gratum esse intellexi et magno opere jucundum,Cic. Att. 1, 8, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary