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Use "unpompous" in a sentence
"At least, though, she deals with some of the problems in a serious but accessible and unpompous way, without using technical terms like ‘rigid designator’ (surely that is (pace you) a point in her favour), and she gives good links as pointers – to scholarly, often the original, articles, not just to Wikipedia."
"Soon the new queen established an unpompous royal style."
"As for Clive Pritchard, he bicycles to his office every day and has become quite unpompous."