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Use "perceptibly" in a sentence
"To the extent that our lives do not differ perceptibly from the lives of convinced advocates of U.S. exceptionalism, the rest of the world will justifiably number us among those advocates."
"With the passing minutes the lines deepened on his haggard countenance, his expression perceptibly aged."
"I indeed perceptibly gained on it; and when, after nearly two days 'journey, I beheld my enemy at no more than a mile distant, my heart bounded within me."