Where does “sopravvitto” come from?

sopravvitto (Italian) comes from Italian vitto, from Latin victus, from Latin vīvō, from Proto-Italic gʷīwō, from Proto-Indo-European gʷíh₃weti, from Proto-Indo-European gʷih₃wós, from Proto-Indo-European gʷeih₃w- — to live.

sopravvitto (Italian): food supplement, supplementary food especially in the context of penitentiary structures

Definitions

food supplement, supplementary food especially in the context of penitentiary structures

Ancestry of “sopravvitto”, step by step

Step	Language	Word	Meaning
1	Italian	vitto	food; board
2	Latin	victus	living, way of life, lifestyle; nourishment,...
3	Latin	vīvō	to live
4	Proto-Italic	gʷīwō	live, be alive
5	Proto-Indo-European	gʷíh₃weti	to live, to be alive
6	Proto-Indo-European	gʷih₃wós	alive, living
7	Proto-Indo-European	gʷeih₃w-	to live

Every word from Proto-Indo-European gʷeih₃w- →Every word from Proto-Indo-European gʷih₃wós →Every word from Proto-Indo-European gʷíh₃weti →