Where does “turbulent” come from?

turbulent (Old French) comes from Latin turbulentus, from Latin -ulentus, from Latin -entus, from Latin cruentus, from Latin cruor, from Proto-Indo-European krewh₂- — blood outside the body.

Ancestry of “turbulent”, step by step

Step	Language	Word	Meaning
1	Latin	turbulentus	stormy, turbulent; unruly, riotous
2	Latin	-ulentus	adjective-forming suffix meaning abounding in,...
3	Latin	-entus	adjective-forming suffix meaning abounding in,...
4	Latin	cruentus	bloody in its various senses, "particularly:"
5	Latin	cruor	blood, gore; murder, bloodshed
6	Proto-Indo-European	krewh₂-	blood outside the body

Every word from Proto-Indo-European krewh₂- →