Where does “sythæ” come from?

sythæ (Old Danish) comes from Old Norse sjóða, from Proto-Germanic seuþaną, from Proto-Indo-European h₂sewt- — to roil; to move about, roil, seethe.

Ancestry of “sythæ”, step by step

StepLanguageWordMeaning
1Old Norsesjóðato seethe, boil; cook; to forge; to brood over
2Proto-Germanicseuþanąto seethe; boil
3Proto-Indo-Europeanh₂sewt-to roil; to move about, roil, seethe
Every word from Proto-Indo-European h₂sewt- →Every word from Proto-Germanic seuþaną →Every word from Old Norse sjóða →