This classic Monty Python sketch, “Bookshop,” contains a memorable use of the word expurgate, which means “to censor, to remove morally offensive passages.”
The funny part — if you haven’t heard or seen the sketch before — is that the customer in the bookshop wants an expurgated version of a book that no one would normally find the need to censor: Olsen’s Standard Book of British Birds. (He dislikes a particular bird — they have “long, nasty beaks”).
There are a few other GRE words relating to censoring or shortening:
Abridge – “To shorten by omissions while retaining the basic contents,” as is frequently done when adapting a book to audiobook format.
Truncate – “to shorten by cutting off a part; cut short”
And, of course, don’t get censor mixed up with censure, which means to disapprove, especially formally.