infeliciter
From LSJ
ἔνθα οὐκ ἔστι πόνος, οὐ λύπη, οὐ στεναγμός, ἀλλὰ ζωὴ ἀτελεύτητος → where there is no pain, no sorrow, no sighing, but life everlasting
Latin > English (Lewis & Short)
infēlīcĭter: adv., v. infelix.
Latin > French (Gaffiot 2016)
īnfēlīcĭter,¹³ malheureusement : Ter. Eun. 329 ; Liv. 1, 45, 3 ; 2, 35, 8