welt

ot noun

1. A ridge or lump on the skin, as caused by a blow; a wheal or weal.
2. (shoemaking) A strip of leather set into the seam between the outsole of a shoe and the upper, through which these parts are joined by stitching or stapling.
3. A strip of material or covered cord applied to a seam or garment edge to strengthen or cover it.
4. In steam boilers and sheet-iron work, a strip riveted upon the edges of plates that form a butt joint.

fe’l verb

1. To roll; revolve
2. To cause to have welts, to beat.
3. To install welt (a welt or welts) to reinforce.
4. To decay.