Where does “Vacus” come from?

Vacus (Latin) comes from Latin vacuus, from Latin -uus, from Proto-Italic *-wos, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Ancestry of “Vacus”, step by step

StepLanguageWordMeaning
1Latinvacuusempty, vacant, unoccupied; devoid or free of,...
2Latin-uusforms adjectives on verbal stems
3Proto-Italic*-wos—
4Proto-Indo-European-wósCreates adjectives from verb stems
Every word from Proto-Indo-European -wós →Every word from Latin -uus →Every word from Latin vacuus →
Vacus — Etymology, Origin & Word History | Etymology Explorer