Blister

What is Blister ?

Blister is (noun) a swelling on the skin containing liquid, caused by rubbing or burning, or by a disease such as chickenpox I can’t run I’ve got a blister on my heel. ((verb)) to make a swelling on a surface The heat had blistered the paint. His hands were blistered in the fire.

 

source: Easier English, Student Dictionary Upper Intermediate Level