Where does “buro” come from?

buro (Polish) comes from Polish Bury, from Polish bury, from Latin burrus, from Ancient Greek πυρρός, from Ancient Greek πῦρ, from Proto-Indo-European péh₂wr̥ — bonfire; spelt.

Ancestry of “buro”, step by step

Step	Language	Word	Meaning
1	Polish	Bury	brownish dark grey
2	Polish	bury	brownish dark grey; dark grey with spots; bear
3	Latin	burrus	red, reddish-brown
4	Ancient Greek	πυρρός	flame-coloured, yellowish-red; red-haired,...
5	Ancient Greek	πῦρ	a fire; lightning; a fever
6	Proto-Indo-European	péh₂wr̥	bonfire; spelt

Every word from Proto-Indo-European péh₂wr̥ →Every word from Ancient Greek πῦρ →Every word from Ancient Greek πυρρός →