blister

noun

1. a raised patch of skin, specif. of epidermis, filled with watery matter and caused by a burn, frostbite, rubbing, etc.
2. something used or applied to cause a blister
3. anything resembling a blister, as on a plant, a coat of paint, etc.
4. a bulging, bubblelike projection, usually transparent, used for observation, protection, etc. on an aircraft, train, car, etc.
5. a transparent, rigid shell, used to package, protect, and display an article of merchandise

transitive verb

1. to cause blisters to form on
2. to beat severely
3. to lash with words

intransitive verb