blis·ter 
(blĭstər)
(blĭstər)n.
1.
a. A local swelling of the skin that contains watery fluid and is caused by burning or irritation.
b. A similar swelling on a plant.
2.
a. A raised bubble, as on a painted or laminated surface.
b. A rounded, bulging, usually transparent structure, such as one used for observation on certain aircraft or for display and protection of packaged products.
v. blis·tered, blis·ter·ing, blis·ters
v.tr.
1. To cause a blister to form on.
2. To reprove harshly.
v.intr.
To break out in or as if in blisters.
[Middle English, probably from Old French blestre, of Germanic origin.]
blister·y adj.