Hauptwort (German) comes from German wôrt, from Middle High German wort, from Old High German wort, from Proto-West Germanic word, from Proto-Germanic wurdą, from Proto-Indo-European werdʰo-, from Proto-Indo-European werh₁- — to speak, say.
Hauptwort (German): noun (sensu stricto), substantive
Hauptwort traces back through two separate lines of ancestry.