Longman Dictionary of Contemporary English
pencil sharpener
noun
EXAMPLES FROM CORPUS
▪ His leg sort of jams into the plastic like a pencil into a pencil sharpener.
Wiktionary
pencil sharpener
n. A device used to sharpen pencils by shaving the wood at one end.
Wikipedia
Pencil sharpener
A pencil sharpener (also referred to in Ireland as a parer or topper) is a device for sharpening a pencil's writing point by shaving away its worn surface. Pencil sharpeners may be operated manually or by an electric motor.