proclivo

From LSJ

αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point

Source

Latin > French (Gaffiot 2016)

prōclīvō, āre (proclivus), intr., pencher : Tert. Herm. 41.