Correct spelling for the English word "Sweal" is [swˈiːl], [swˈiːl], [s_w_ˈiː_l] (IPA phonetic alphabet).
To melt wastefully away like bad candles; to singe, as a hog.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.