horribiliter
From LSJ
ἐν δὲ μηνὸς πρῶτον τύχεν ἆμαρ → it chanced to be on the first of the month, that day fell on the first of the month
Latin > French (Gaffiot 2016)
horrĭbĭlĭter (horribilis), d’une manière prodigieuse : Aug. Civ. 1, 8 || -bilius Aug. Civ. 4, 3.
Latin > German (Georges)
horribiliter, Adv. (horribilis), staunenswert, Aurel. b. Fronto ep. ad M. Caes. 2, 3 (6) extr. p. 29, 4 N. Augustin. de civ. dei 1, 8 extr.: Compar. horribilius, Augustin. de civ. dei 4, 3. p. 149, 8 D.2