infideliter
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Latin > English (Lewis & Short)
infĭdēlĭter: adv., v. infidelis.
Latin > French (Gaffiot 2016)
īnfĭdēlĭtĕr,¹⁶ d’une manière peu sûre, peu loyale : Cic. ad Br. 1, 2 ; Vulg. Is. 21, 2.
Latin > German (Georges)
īnfidēliter, Adv. (infidelis), ungetreu, unredlich, Cic. ep. ad Brut. 2, 1, 2. Vulg. Isai. 21, 2: Superl. infidelissime, Salv. c. avar. 3, 13. § 58 H.