Where does “alūn” come from?

alūn (Middle High German) comes from Old High German alūne, from Old French alun, from Latin alūmen, from English -ium, from Latin -um, from Proto-Italic *-om, from Proto-Indo-European *-oHom.

Ancestry of “alūn”, step by step

StepLanguageWordMeaning
1Old High Germanalūne—
2Old FrenchalunAlternative form of alum
3Latinalūmenalum
4English-ium1997, Bryan Pfaffenberger, "Official Microsoft...
5Latin-umnominative neuter singular of -us; accusative...
6Proto-Italic*-om—
7Proto-Indo-European*-oHom—

Words derived from “alūn”

Every word from Proto-Indo-European *-oHom →Every word from English -ium →Every word from Latin alūmen →