Öffnungslaut (German) comes from German Laut, from Middle High German lūt, from Old High German lūt, from Proto-West Germanic hlūd, from Proto-Germanic hlūdaz, from Proto-Indo-European ḱlewtos, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.
Öffnungslaut (German): approximant
Definitions
approximant
Ancestry of “Öffnungslaut”, step by step
Öffnungslaut traces back through two separate lines of ancestry.