Proto-Baltic: *swil̃- (*swela-) vb. tr./intr., *swel-ē̂- (*swel-a-) vb., *swil̂- vb. intr., *swil̂-t-a- c., *swil̂-t-ā̂ f., *swel̂-m-iā̃ f. (1/2), *swēl-a- c. (1), *swal-a- c., *swal-ā̂ f.
Meaning: smoulder
Lithuanian: sveltu (svela, svelē) 'glimmen, schwelen', svelḗti (svẽla) 'ansengen'; svìlti (svī̃la/žem. svìlsta, svìlō) `sengen, schwelen', nordlit. svil̃ti (svẽla) 'schwelen, glimmen', caus. svìlinti; pl. svìltai, svìltōs 'angebrannte Speiseteile, Brandgeruch, angebrannte Stelle'
Lettish: svel̂t2 (svel̨u, svēlu) tr., intr. 'sengen', svel̃me, svel̂me 'Glut (von Kohlen), Dampf von Gesengtem; in die Höhe steigender Dampf', svę̄ls 'Glut'; svals, svala `Dampf, Rauch'
