People who had hardly noticed his resemblance to Henry Fonda before now never ceased discussing it, and there were even those who hinted sinisterly that Major Major had been elevated to squadron commander because he resembled Henry Fonda.
There was a sinister and unlikely coincidence exposed that was too diabolical in implication to be anything less than the most hideous of omens.
The colonel sat back when he had finished and was extremely pleased with himself for the prompt action he had just taken to meet this sinister crisis.
He experienced a keen premonition of danger and wondered if the chaplain too were plotting against him, if the chaplain’s reticent, unimpressive manner were really just a sinister disguise masking a fiery ambition that, ’way down deep, was crafty and unscrupulous.
The sinister coincidence shook him and filled him with doubt and dread.
’What the devil do you mean, he won’t fly more missions?’ he asked with a smile, as Colonel Cathcart crept away into a corner to brood about the sinister import of the name Yossarian popping up to plague him once again.
The possibility that there really had been a naked man in the tree — two men, actually, since the first had been joined shortly by a second man clad in a brown mustache and sinister dark garments from head to toe who bent forward ritualistically along the limb of the tree to offer the first man something to drink from a brown goblet — never crossed the chaplain’s mind.
There are no more uses of "sinister" in the book.
Show samples from other sources
They created a sinister plan to recruit terrorists.
In the movie, there was a sinister plot to kill people and harvest their organs.