perniciose
From LSJ
Ἡ δὲ Σελήνη γενομένη μὲν ἐκ τῆς ἀντανακλάσεως τοῦ ἡλιακοῦ φωτὸς → the moon having been made from the reflection of sunlight (Vettius Valens, Anthologies 1.14)
Latin > English (Lewis & Short)
pernĭcĭōsē: adv., v. perniciosus.
Latin > French (Gaffiot 2016)
pernĭcĭōsē,¹⁶ pernicieusement, d’une manière funeste : Cic. Leg. 2, 13 || -sius Cic. Leg. 3, 32 ; -sissime Aug. Ep. 39.