An Etymological Dictionary of the German Language/schwelen
schwelen, vb., ‘to burn slowly, smoulder,’ ModHG. only, from LG. For the Teut. root swel in OHG. swilizôn, ‘to burn slowly’, and AS. swëlan, ‘to glow,’ see under schwül.
schwelen, vb., ‘to burn slowly, smoulder,’ ModHG. only, from LG. For the Teut. root swel in OHG. swilizôn, ‘to burn slowly’, and AS. swëlan, ‘to glow,’ see under schwül.