Where does “longsum” come from?

longsum (Middle English) comes from Old English langsum, from Proto-West Germanic langasam, from Proto-West Germanic lang, from Proto-Germanic langaz, from Proto-Indo-European dlongʰos — long.

Ancestry of “longsum”, step by step

StepLanguageWordMeaning
1Old Englishlangsumlong, long-lasting; wearisome, prolix, tedious,...
2Proto-West Germaniclangasamlengthy; drawn-out, long-lasting, extended,...
3Proto-West Germaniclanglong
4Proto-Germaniclangazlong
5Proto-Indo-Europeandlongʰoslong

Words derived from “longsum”

Every word from Proto-Indo-European dlongʰos →Every word from Proto-Germanic langaz →Every word from Proto-West Germanic lang →