Where does “bistro” come from?

bistro (Dutch) comes from French bistro, from Russian бы́стро, from Russian бы́стрый, from Old East Slavic быстрыи, from Proto-Slavic bystrъ, from Proto-Indo-European bʰūsro-.

bistro (Dutch): a bistro, a diner (particularly in a French style)

Definitions

a bistro, a diner (particularly in a French style)

Ancestry of “bistro”, step by step

Step	Language	Word	Meaning
1	French	bistro	bistro
2	Russian	бы́стро	quickly
3	Russian	бы́стрый	fast, quick, speedy, rapid
4	Old East Slavic	быстрыи	—
5	Proto-Slavic	bystrъ	quick; penetrating, transparent
6	Proto-Indo-European	bʰūsro-	—

Every word from Proto-Indo-European bʰūsro- →Every word from Proto-Slavic bystrъ →Every word from Old East Slavic быстрыи →