To sew a welt on or in.
To flog severely.
A strip of material, to cover a seam.
A swollen stripe on the skin, made by a lash.
45 and a welt of red above his ear where a Mexican's bullet had creased him. – Sundown Slim by Henry Hubert Knibbs
Was ist die Welt und ihre gantze Pracht? – An anthology of German literature by Calvin Thomas