Where does “pallido-” come from?

pallido- (English) comes from Latin pallidus, from Latin -idus, from Proto-Italic *-iðos.

Ancestry of “pallido-”, step by step

Step	Language	Word	Meaning
1	Latin	pallidus	pale, pallid, wan; that makes or causes a pale...
2	Latin	-idus	tending to
3	Proto-Italic	*-iðos	—

pallido- — Etymology, Origin & Word History | Etymology Explorer