(For the outer layer of s.t.) to peel, flake, chip, rip, strip off (as dry paint or skin).
Nurina's fingernail peeled off because her friend accidently whacked it with a stick.
To pull, rip, peel, or strip s.t. off [N-]; to begin to peel, chip, or flake off [N-]; to peel off [pa-].
The -un imp. focuses on using that which is peeled off. The -an imp. focuses on not using that which is peeled off.
This lemon's peel won't peel off.
Pull that board off so I can make an oar out of it.