Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
libertarian, libertine (adjs., nn.)
A libertarian is a believer in free will or, more frequently, a supporter of absolute freedom of thought, word, and deed. A libertine was once a freed slave in Rome, but today a libertine is morally unrestrained, a profligate, dissolute person, and the word as both noun and adjective is a pejorative.
