Where does “lanksum” come from?

lanksum (Middle Low German) comes from Proto-West Germanic langasam, from Proto-West Germanic lang, from Proto-Germanic langaz, from Proto-Indo-European dlongʰos — long.

Ancestry of “lanksum”, step by step

StepLanguageWordMeaning
1Proto-West Germaniclangasamlengthy; drawn-out, long-lasting, extended,...
2Proto-West Germaniclanglong
3Proto-Germaniclangazlong
4Proto-Indo-Europeandlongʰoslong
Every word from Proto-Indo-European dlongʰos →Every word from Proto-Germanic langaz →Every word from Proto-West Germanic lang →