infeliciter
From LSJ
εἰ μὴ ἦλθον καὶ ἐλάλησα αὐτοῖς, ἁμαρτίαν οὐκ εἶχον → if I had not come and spoken to them, they would not be guilty of sin
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 || -cius Quint. 8, 6, 33 ; -issime Aug. Civ. 12, 13.