blister
noun
[ ˈblɪstə ]
• a small bubble on the skin filled with serum and caused by friction, burning, or other damage.
• "his heels were covered in blisters"
• an annoying person.
• "the child is a disgusting little blister"
blister
verb
• form blisters on the skin or other surface.
• "the surface of the door began to blister"
Origin:
Middle English: perhaps from Old French blestre ‘swelling, pimple’.
