The property of being subtle, of avoiding brute force and instead being clever or skillful.(noun)
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Use "subtleness" in a sentence
"Their subtleness is exactly what makes them so difficult to reproduce."
"Belbeis had long ago proved his fidelity, and as to his "subtleness," of which Naoum had spoken, that was beyond doubt."
"Dredging up an obscure event from Paul's student years, this ad lacks any subtleness while making hysterical smears that it couldn't possibly support."