Lewis & Short

sēdŭlus, a, um, adj. [etym. dub.; acc. to Curt. from root ἑδ-, to go; Gr. ὁδός, way; whence Lat. solum, solium; cf. tremulus, from tremo; prop. active, inclined to motion; but perh. better referred to root sed-, sid-, (Sanscr. sad-), of sedeo; Engl. sit; cf. assiduus. The derivation from sē-dolo, adopted by Don. Ter. Ad. 3, 3, 59; Serv. Verg. A. 2, 374; Non. 37, 28; and Isid. Orig. 10, 244 and 247; cf. Döderl. Syn. 1, p. 117 sq. al., is an error]; orig. sitting fast, persisting in some course of action; hence,

  1. I. busy, diligent, industrious, zealous, careful, unremitting, solicitous, assiduous, sedulous (mostly poet.; syn.: diligens, officiosus, attentus): eloquentes videbare, non sedulos velle conquirere, orators, not those who labor at oratory, Cic. Brut. 47, 176: haec a concubitu fit sedula, tardior illa, Ov. A. A. 1, 377: exanimat lentus spectator, sedulus inflat, Hor. Ep. 2, 1, 178: tantum venerata virum hunc sedula curet, Tib. 1, 5, 33; cf. puer (minister), Hor. C. 1, 38, 6: agricola, Plin. 17, 14, 24, § 101: olitor, Col. poët. 10, 148: apis, Tib. 2, 1, 50; Ov. M. 13, 928: Baucis, id. ib. 8, 640: anus, Tib. 1, 3, 84: nutrix, Ov. H. 21, 95; id. M. 10, 438; Hor. A. P. 116: mater, Phaedr. 4, 5, 13: deducat juvenum sedula turba senem, Tib. 1, 4, 80: sedula fune viri contento bracchia lassant, Ov. F. 4, 297: labor, Sen. Hippol. 1109: opera, App. M. 9, p. 237: industria, id. ib. 2, p. 128: ministerium, id. ib. 11, p. 267: cura, Col. 8, 1, 3 et saep.: velim te arbitrari factum. R. Sedulum est, submoventur hostes, removentur lapides, Plaut. Fragm. ap. Charis. p. 194 P.
  2. II. With an invidious implication, officious, obtrusive: ne studio nostri pecces odiumque libellis Sedulus importes opera vehemente minister, Hor. Ep. 1, 13, 5: hospes, id. S. 1, 5, 71: nec quisquam flammae sedulus addat aquam, Tib. 2, 4, 42: luna, Prop. 1, 3, 32; cf.: male sedulus, Ov. A. A. 3, 699; id. M. 10, 438.
    Hence, advv.
    1. A. sēdŭlō, busily, diligently, industriously, eagerly, carefully, zealously, unremittingly, assiduously, solicitously, sedulously.
      1. 1. In gen. (very freq. and class.; a favorite word of Plaut. and Ter.): nam ille amico suo sodali sedulo rem mandatam exsequitur, Plaut. Bacch. 3, 3, 71 sq.: ut cognorant, dabimus operam sedulo, id. Cas. prol. 16; so, operam dare, id. Pers. 4, 7, 10; id. Men. 5, 7, 20: addere, id. Cist. 1, 1, 54; id. Most. 1, 2, 41: comparare quae opus sunt, Liv. 1, 41: faciam sedulo, Ut, etc., Plaut. Capt. 2, 3, 25.
        Most freq. with facere; cf. Cato, R. R. 2, 2; Plaut. Ep. 2, 2, 108; id. Bacch. 4, 8, 30; id. Merc. 2, 3, 126; id. Poen. 1, 2, 144; id. Pers. 1, 1, 47 sq.; Ter. And. 3, 4, 18; 4, 1, 56; id. Eun. 2, 3, 71; id. Heaut. 1, 1, 74; 2, 4, 16; id. Ad. 1, 1, 25; 2, 2, 43; Cic. Clu. 21, 58; id. Fin. 3, 4 fin.; Vatin. ap. Cic. Fam. 5, 10 a, 2.
        With fieri, Plaut. Merc. 2, 2, 31; id. Rud. 1, 4, 22; id. Trin. 1, 2, 155; Ter. Ad. 3, 3, 59; id. Phorm. 1, 4, 51; 5, 8, 12; Cic. Fam. 2, 11 fin.; cf.: sedulo id ago, Ter. And. 3, 5, 8: agitans mecum, id. Phorm. 4, 3, 10: ad socios nostros sedulo dispertieram, alio frumentum, alio legatos, etc., Cato ap. Charis. p. 197 P.; cf.: salutem impertit studiose et sedulo, Lucil. ap. Non. 37, 30: aliquid conservare, Cato, R. R. 5, 8: servare, Plaut. Capt. 2, 2, 7; id. Curc. 5, 2, 41; id. Rud. 2, 3, 52: celare, id. Aul. 1, 2, 35: dissimulare, Ter. Hec. 4, 2, 2; id. Phorm. 2, 3, 81: animum advertere, Plaut. Stich. 4, 1, 40; id. Rud. 2, 2, 1; cf.: munditer se habere, id. Poen. 1, 2, 26: Ge. Valuistine usque? Ep. Sustentatum’st sedulo, id. Stich. 3, 2, 14; 4, 2, 8: sedulo aliquid dicere, to assert emphatically, protest, id. Capt. 4, 2, 106; cf.: ego illud sedulo Negare factum; ille instat factum, Ter. And. 1, 1, 119; so, moneo, id. Ad. 3, 3, 72: et moneo, et hortor, id. Hec. 1, 1, 6: credere, i. e. sincerely, id. Phorm. 2, 4, 13; cf. argumentari, Cic. Att. 3, 12, 1.
      2. 2. In partic., with an implication of design, on purpose, designedly, intentionally (rare; not in Cic.): aliquid occultare, Plaut. Capt. 2, 2, 48: fingit causas, ne det, sedulo, Ter. Eun. 1, 2, 58: nusquam nisi in virtute spes est, milites, et ego sedulo, ne esset, feci, Liv. 34, 14: diem extrahere, id. 28, 15: tempus terere, id. 3, 46: imitari aliquem, Quint. 7, 1, 54.
    2. B. sēdŭlē, busily, diligently, carefully, etc. (post-Aug. and rare): semper custos sedule circumire debet alvearia, Col. 9, 9, 1: hoc munus implet sedule, Prud. στεφ. 5, 407; Vulg. 4 Reg. 4, 13.