Which word means aggressively hostile or eager to fight?

Andre Agassi won the 1995 Australian Open by beating which player, his co-star in Nike's "guerrilla tennis" ads? Agatha Christie put Hercule Poirot aboard a boat called the Karnak in which 1937 novel? Who was 87 when he died in office in 1864, making him the oldest man ever to serve as U.S. chief justice? Agent K, Agent J and Jack Jeebs are characters in which 1997 film? Aglets are the small plastic or metal tips on the ends of what? Agnes de Mille won a 1947 Tony Award for choreographing which musical about a Scottish village that appears once every… Agnes de Mille's success with which 1942 Aaron Copland ballet led to her hiring as choreographer for "Oklahoma!"? Which word means agreeably pungent or sharp in taste?