Where does “perdiz” come from?

perdiz (Old Portuguese) comes from Latin perdix, from Ancient Greek πέρδιξ, from Ancient Greek πέρδομαι, from Proto-Hellenic pérdomai, from Proto-Indo-European pérdetor, from Proto-Indo-European perd- — to fart loudly, pass gas, break wind.

Ancestry of “perdiz”, step by step

Step	Language	Word	Meaning
1	Latin	perdix	partridge
2	Ancient Greek	πέρδιξ	partridge
3	Ancient Greek	πέρδομαι	to fart, break wind
4	Proto-Hellenic	pérdomai	to fart loudly
5	Proto-Indo-European	pérdetor	to be farting
6	Proto-Indo-European	perd-	to fart loudly, pass gas, break wind

Every word from Proto-Indo-European perd- →Every word from Proto-Indo-European pérdetor →Every word from Proto-Hellenic pérdomai →