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Use "surlier" in a sentence
"They're both prone to sloppier dress and surlier demeanor."
"He had become surlier, more distant, and more detached when they were together."
"Since then, I have watched year after year as Ride-On drivers have become ever surlier, ever more distanced from the basic concept of customer service, ever less cognizant that riders -- and taxpayers -- pay their salaries."