Where does “bwyt” come from?

bwyt (Middle Welsh) comes from Proto-Brythonic buɨd, from Proto-Celtic *beitom, from Proto-Indo-European gʷeyh₃tom, from Proto-Indo-European gʷeyh₃- — to live.

Ancestry of “bwyt”, step by step

Step	Language	Word	Meaning
1	Proto-Brythonic	buɨd	food
2	Proto-Celtic	*beitom	—
3	Proto-Indo-European	gʷeyh₃tom	—
4	Proto-Indo-European	gʷeyh₃-	to live

Every word from Proto-Indo-European gʷeyh₃- →

bwyt — Etymology, Origin & Word History | Etymology Explorer