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Use "feistiness" in a sentence
"Sex Scene-as-Explanation Award: After The Good Wife's Peter sees his wife challenge a judge in court, he realizes that her feistiness is ... kind of a turn-on."
"Although Lonnie claimed to admire her so-called feistiness when it was directed at a sloppy repairman or a short-changing pizza delivery person, he wanted her to be as meek as a geisha girl when dealing with him."
"Your feistiness has been the talk of the entire village."