Where does “skolu” come from?

skolu (Old Norse) comes 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 “skolu”, step by step

StepLanguageWordMeaning
1Proto-Germanicskulanąto owe; to be obliged to, have to; shall, will,...
2Proto-Indo-Europeansḱel-to be obligated, owe
3Proto-Indo-Europeanḱelh₁-to warm up, to be hot; to warm up, be hot
Every word from Proto-Indo-European ḱelh₁- →Every word from Proto-Indo-European sḱel- →Every word from Proto-Germanic skulaną →