Where does “guasto” come from?

guasto (Italian) comes from Italian guastare, from Latin vastō, from Latin vastus, from Proto-Celtic wāstos, from Proto-Indo-European h₁weh₂- — to leave, abandon, give out.

guasto (Italian): spoilt, damaged, ruined; rotten, bad, gone bad;...

Definitions

spoilt, damaged, ruined; rotten, bad, gone bad;...

Ancestry of “guasto”, step by step

Step	Language	Word	Meaning
1	Italian	guastare	to ruin or damage; to break; to corrupt, lead...
2	Latin	vastō	to devastate, destroy, ravage, lay waste
3	Latin	vastus	Empty, unoccupied, i.e. waste, desert; Desolate,...
4	Proto-Celtic	wāstos	empty
5	Proto-Indo-European	h₁weh₂-	to leave, abandon, give out

Every word from Proto-Indo-European h₁weh₂- →Every word from Proto-Celtic wāstos →Every word from Latin vastus →