Jack Miller, Speller 418, is in his final Scripps National Spelling Bee. The Texas eighth grader tied for 50th place in 2015, 172nd place in 2016 and 41st place in 2017. His sister, Kate, competed for three years, from 2012 to 2014. That year, she finished in eighth place.
Jack's word was "nebulous," meaning vaguely defined : poorly grasped : dimly realized.
He spelled it correctly.