Which six-letter word means mirthless, sober or grave?

Which six-letter term names an authoritative statement, such as a judge's remark? Which six-letter term describes care given after surgery? Which six-letter verb means to board a ship? Which word names both fishing equipment and a football move? Six members of which radical group that kidnapped Patty Hearst died in a fiery shootout in May 1974? Six of Bugs Moran's henchmen and an optometrist were the victims of which 1929 slaughter in Chicago? Weeks after his death in May 1998, which singer had six albums on Billboard's Top Pop Catalog chart? Six of which birds were brought inside at the Tower of London in 2006 to guard against bird flu?