Where does “diversissimo” come from?

diversissimo (Italian) comes from Italian diverso, from Latin dīversus, from Latin dīvertō, from Latin dī-, from Ancient Greek δί-, from Ancient Greek διά, from Proto-Indo-European dwís, from Proto-Indo-European dwóh₁ — two.

Ancestry of “diversissimo”, step by step

Step	Language	Word	Meaning
1	Italian	diverso	different, diverse; several; homosexual, gay
2	Latin	dīversus	opposite
3	Latin	dīvertō	to separate
4	Latin	dī-	Two, double; di
5	Ancient Greek	δί-	Twice, double
6	Ancient Greek	διά	throughout
7	Proto-Indo-European	dwís	twice, doubly; in two
8	Proto-Indo-European	dwóh₁	two

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwís →Every word from Ancient Greek διά →