question:  Which word doesn't describe Jeffers?
context: "Try not to be simple—for once!" growled Jeffers. Jeffers fidgeted in his chair, causing it to creak under the bulk of his body. It had been built for Ganymede, but not for Jeffers. "Okay I can't fire you legally—as long as you report for work," grumbled Jeffers, by now a shade more ruddy. Tolliver began to have his doubts the next day; which was "Tuesday" by the arbitrary calender constructed to match Ganymede's week-long journey around Jupiter. His contract guaranteed a pilot's rating, but someone had neglected to specify the type of craft to be piloted. On the bulletin board, Tolliver's name stood out beside the number of one of the airtight tractors used between the dome city and the spaceport, or for hauling cross-country to one of the mining domes. He soon found that there was nothing for him to do but hang around the garage in case a spaceship should land. Sometimes there's no reason but them for sending a ship back with a crew instead of in an economy orbit. Under a portable, double-chambered plastic dome blown up outside the ship's airlock, a crewman helped him load two trunks and a collection of bags into the tractor. Trying already to be just one of the gang, instead of Lady Betty! They found they could send back loaded ships by 'automatic' flight—that is, a long, slow, economical orbit and automatic signalling equipment. And Daddy's little girl is trying too hard to sound like one of the gang. He enlarged upon other dangers to be encountered on the satellite, taking care to impress the newcomer with the daredeviltry of John Tolliver, driver of "missions" across the menacing wastes between dome and port. It did not, naturally, indicate he was drawing the salary of a space pilot. "Made my pile. I'll get hold of her after Jeffers is through and set her straight , he resolved.
output:  clever
options:  clever  persistent  hot-headed  cocky