difficiliter
From LSJ
τὰ ἀφανῆ τοῖς φανεροῖς τεκμαίρου → analyze the unknown based on the known
Latin > English (Lewis & Short)
diffĭcĭlĭter:
I adv., with difficulty; v. difficilis fin., no. γ.
Latin > French (Gaffiot 2016)
diffĭcĭlĭtĕr, difficilement rare au positif] : Cic. Ac. 2, 50 || -ilius Cic. Tusc. 4, 32 ; -illime Cic. Amer. 116 ; Læl. 64.