Where does “Citofactum” come from?

Citofactum (Medieval Latin) comes from Latin citō, from Latin -tō, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

Ancestry of “Citofactum”, step by step

Citofactum traces back through two separate lines of ancestry.

via Latin citō

Step	Language	Word	Meaning
1	Latin	citō	quickly, fast
2	Latin	-tō	Forms here
3	Latin	-tus	Forms the past participle of verbs; Forms...
4	Proto-Italic	-tus	—
5	Proto-Indo-European	-tus	Derives action nouns from verb roots

via Latin factum

Step	Language	Word	Meaning
1	Latin	factum	fact, deed, act, doing; achievement; accusative...
2	Proto-Indo-European	dʰeh₁-	to do, put, place

Every word from Proto-Indo-European -tus →Every word from Latin -tus →Every word from Latin -tō →