(adjective) : improsper (inpr-), spĕra, ĕrum, 2. in-prosper
* Unfortunate, unprosperous (post-Aug.): fortuna,Tac. A. 3, 24: moles insidiarum,id. ib. 14, 65: multa claritudine generis sed improspera,id. ib. 4, 44.—Adv.: improspĕrē, unfortunately: cessit,Col. 1, 1, 16; Tac. A. 1, 8; Gell. 9, 9, 12.

s. TLL