Merriam-Webster's Collegiate® Dictionary, 11th Edition
WELT
I. noun
Etymology: Middle English welte
Date: 15th century
a strip between a shoe sole and upper through which they are stitched or stapled together, a doubled edge, strip, insert, or seam (as on a garment) for ornament or reinforcement,
3. a ridge or lump raised on the body (as by a blow or allergic reaction), a heavy blow,
II. transitive verb
Date: 15th century
to furnish with a welt,
2. to raise a welt on the body of, to hit hard