Where does “bassissimo” come from?

bassissimo (Italian) comes from Italian basso, from Latin Bassus, from Ancient Greek βάσις, from Proto-Hellenic gʷə́tis, from Proto-Indo-European gʷémtis, from Proto-Indo-European gʷem- — to step.

Ancestry of “bassissimo”, step by step

Step	Language	Word	Meaning
1	Italian	basso	low; short; narrow, thin
2	Latin	Bassus	thick, fat, stumpy, short, low, base
3	Ancient Greek	βάσις	step; rhythm; foot
4	Proto-Hellenic	gʷə́tis	step
5	Proto-Indo-European	gʷémtis	step, act of walking
6	Proto-Indo-European	gʷem-	to step

Every word from Proto-Indo-European gʷem- →Every word from Proto-Indo-European gʷémtis →Every word from Proto-Hellenic gʷə́tis →