Where does “факультет” come from?

факультет (Russian) comes from German Fakultät, from Latin facultās, from Proto-Italic fakelitāts.

Ancestry of “факультет”, step by step

Step	Language	Word	Meaning
1	German	Fakultät	factorial; faculty, school
2	Latin	facultās	—
3	Proto-Italic	fakelitāts	—

факультет — Etymology, Origin & Word History | Etymology Explorer