Kwoal (Saterland Frisian) comes from Old Frisian quāl, from Proto-Germanic kwalō, from Proto-Germanic kwaljaną, from Proto-Germanic -janą, from Proto-Indo-European -yéti, from Proto-Indo-European yé-, from Chichewa iye — he, she.
Kwoal (Saterland Frisian): pain; agony; torment; anguish