Passage: In 1973, after a four-year disappearance, the Joker was revived (and revised) by writer Dennis O'Neil and artist Neal Adams. Beginning with Batman #251's "The Joker's Five-Way Revenge", the character returns to his roots as an impulsive, homicidal maniac who matches wits with Batman. This story began a trend in which the Joker was used, sparingly, as a central character. O'Neil said his idea was "simply to take it back to where it started. I went to the DC library and read some of the early stories. I tried to get a sense of what Kane and Finger were after." O'Neil's 1973 run introduced the idea of the Joker being legally insane, to explain why the character is sent to Arkham Asylum (introduced by O'Neil in 1974 as Arkham Hospital) instead of to prison. Adams modified the Joker's appearance, changing his more average figure by extending his jaw and making him taller and leaner.DC Comics was a hotbed of experimentation during the 1970s, and in 1975 the character became the first villain to feature as the title character in a comic book series, The Joker. The series followed the character's interactions with other supervillains, and the first issue was written by O'Neil. Stories balanced between emphasizing the Joker's criminality and making him a likable protagonist whom readers could support. Although he murdered thugs and civilians, he never fought Batman; this made The Joker a series in which the character's villainy prevailed over rival villains, instead of a struggle between good and evil. Because the Comics Code Authority mandated punishment for villains, each issue ended with the Joker being apprehended, limiting the scope of each story. The series never found an audience, and The Joker was cancelled after nine issues (despite a "next issue" advertisement for an appearance by the Justice League). The complete series became difficult to obtain over time, often commanding high prices from collectors. In 2013, DC Comics reissued the series as a graphic novel.When Jenette Kahn became DC editor in 1976, she...

Question: What was Joker's original character described as?
an impulsive, homicidal maniac