Word Origin & History
obscene
1593, "offensive to the senses, or to taste and refinement," from M.Fr. obscène, from L. obscenus "offensive," especially to modesty, originally "boding ill, inauspicious," perhaps from ob "onto" + cænum "filth." Meaning "offensive to modesty or decency" is attested from 1598. Legally, in U.S., it hinges on "whether to the average person, applying contemporary community standards, the dominant theme of the material taken as a whole appeals to a prurient interest." [Justice William Brennan, "Roth v. United States," June 24, 1957]