improsper — Lewis & Short
improsper (inpr-), spĕra, ĕrum, adj.2. in-prosper,
I 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.