Where does “lascivitus” come from?

lascivitus (Latin) comes from Latin lascivio, from Latin lascivus, from Latin -īvus, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Definitions

Ancestry of “lascivitus”, step by step

Step	Language	Word	Meaning
1	Latin	lascivio	I frolic, sport, am frisky
2	Latin	lascivus	wanton, playful, frisky; lustful, licentious,...
3	Latin	-īvus	Adjective suffix
4	Proto-Indo-European	-iHwós	—
5	Proto-Indo-European	-wós	Creates adjectives from verb stems

Every word from Proto-Indo-European -wós →Every word from Latin -īvus →Every word from Latin lascivus →