welt
n.n. a small, raised bump on your skin that looks like a tiny hill. It is usually caused by a blow or a sting.
n. a small, raised, often painful swelling on the skin, typically resulting from a blow or a sting. Often used in medical or informal contexts to describe a localized reaction.
He had a welt on his arm from the mosquito bite.
The doctor examined the welt on the patient's leg to determine if it was a result of an allergic reaction or a physical injury.
The hikers returned from the trail with several welts on their arms, evidence of their encounter with the local insect population.
From Middle English welten, from Old English weltan, wieltan, from Proto-Germanic waltijaną, from Proto-Indo-European wel- (“to turn; wind; twist”). Cognate with German wälzen, Danish vælte, Swedish välta, Icelandic velta.
Circa 1425, a shoemaker's term. Perhaps related to Middle English welten (“to overturn, roll over”), from Old Norse velta (“to roll”). Meaning "ridge on the skin from a wound" first recorded 1800.