Where does “skulan” come from?

skulan (Old High German) comes from Proto-West Germanic skulan, from Proto-Germanic skulaną, from Proto-Indo-European sḱel-, from Proto-Indo-European ḱelh₁- — to warm up, to be hot; to warm up, be hot.

Ancestry of “skulan”, step by step

StepLanguageWordMeaning
1Proto-West Germanicskulanto owe, to be obliged
2Proto-Germanicskulanąto owe; to be obliged to, have to; shall, will,...
3Proto-Indo-Europeansḱel-to be obligated, owe
4Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot

Words derived from “skulan

Every word from Proto-Indo-European ḱelh₁-