Where does “Regenbogenhaut” come from?
Regenbogenhaut (German) comes from German Regenbogen, from Middle High German rëgenboge, from Old High German reginbogo, from Proto-Germanic regnabugô, from Proto-Germanic bugô, from Proto-Indo-European bʰugʰ-, from Proto-Indo-European bʰewgʰ- — to bend; curve, arch.
Regenbogenhaut (German): iris
Ancestry of “Regenbogenhaut”, step by step