Latin word fac comes from Latin faciendus, Latin totus, Latin totum

Detailed word origin of fac

Dictionary entry	Language	Definition
faciendus	Latin (lat)
totus	Latin (lat)	(very, rare) so great a —— All together, all at once. Whole, all, entire, total, complete, every part.
totum	Latin (lat)
fac	Latin (lat)