(adj.adv.) : ŏnĕrōsus, a, um, adj.onus
* Burdensome, heavy, oppressive (poet. and in postAug. prose; syn.: gravis, difficilis).
* Lit.: praeda,Verg. A. 9, 384.—Of food that is difficult of digestion and causes oppression: cibus etiam valentibus onerosus,Plin. 23, 7, 62, § 115: (ervum) capiti et stomacho onerosum,id. 22, 25, 73, § 153.— Comp.: aër est onerosior igni,Ov. M. 1, 53.
* Trop., burdensome, onerous, irksome: onerosior altera sors est,Ov. M. 9, 675: donatio,Plin. Ep. 2, 4, 3: quam sit onerosum succedere bono principi,id. Pan. 44, 7: consolatores,Vulg. Job, 16, 2.—Hence, adv.: ŏnĕrōsē, odiously (post-class.), Paul. Nol. Ep. 11.—Comp.: onerosius,Cassiod. Anim. 11.

s. TLL