principaliter
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)
princĭpālĭter: adv., v. principalis.
Latin > French (Gaffiot 2016)
prīncĭpālĭtĕr,¹⁵
1 en prince, d’une manière digne d’un prince : Sen. Polyb. 17, 4
2 principalement : Dig. 3, 2, 4.