Where does “swat” come from?

swat (Middle English) comes from Old English swāt, from Proto-Germanic swait-, from Proto-Indo-European swoyd-, from Proto-Indo-European sweyd- — sweat; to sweat.

Ancestry of “swat”, step by step

StepLanguageWordMeaning
1Old Englishswātperspiration; sweat; sweat
2Proto-Germanicswait-sweat; blood
3Proto-Indo-Europeanswoyd-to sweat
4Proto-Indo-Europeansweyd-sweat; to sweat
Every word from Proto-Indo-European sweyd- →Every word from Proto-Indo-European swoyd- →Every word from Proto-Germanic swait- →