Where does “liquidissimo” come from?

liquidissimo (Italian) comes from Italian liquido, from Latin liquidus, from Latin liqueō, from Proto-Italic wlikʷēō, from Proto-Indo-European wlikʷ-éh₁-ye-ti, from Proto-Indo-European wleykʷ- — moist, to wet.

Ancestry of “liquidissimo”, step by step

Step	Language	Word	Meaning
1	Italian	liquido	liquid; runny; liquid, fluid
2	Latin	liquidus	liquid, fluid, flowing; clear, transparent,...
3	Latin	liqueō	to be liquid, fluid
4	Proto-Italic	wlikʷēō	—
5	Proto-Indo-European	wlikʷ-éh₁-ye-ti	—
6	Proto-Indo-European	wleykʷ-	moist, to wet

Every word from Proto-Indo-European wleykʷ- →Every word from Proto-Indo-European wlikʷ-éh₁-ye-ti →Every word from Proto-Italic wlikʷēō →