improspere
From LSJ
Ubi idem et maximus et honestissimus amor est, aliquando praestat morte jungi, quam vita distrahi → Where indeed the greatest and most honourable love exists, it is much better to be joined by death, than separated by life.
Latin > French (Gaffiot 2016)
improspĕrē¹⁵ (in, prospere), sans succès : Col. Rust. 1, 1, 16 ; Tac. Ann. 1, 8 ; Gell. 9, 9, 12.