Where does “livide” come from?

livide (Middle English) comes from Old French livide, from Latin lividus, from Latin liveo, from Proto-Italic sliwēō, from Proto-Indo-European sliwo-, from Proto-Indo-European (s)leh₃y- — blueish.

Ancestry of “livide”, step by step

Step	Language	Word	Meaning
1	Old French	livide	—
2	Latin	lividus	leaden, bluish, blue; black and blue, livid;...
3	Latin	liveo	I am of a bluish color; I am livid; I am envious,...
4	Proto-Italic	sliwēō	—
5	Proto-Indo-European	sliwo-	—
6	Proto-Indo-European	(s)leh₃y-	blueish

Every word from Proto-Indo-European (s)leh₃y- →Every word from Proto-Indo-European sliwo- →Every word from Proto-Italic sliwēō →