: shameless boldness : insolence
Holly could not believe the effrontery of the student who asked that her grade be changed even though she had completed little of the coursework.
"'I [Amanda Seyfried] once made a pecan pie for a guy I was dating, and we had a nice meal … with friends, and then that night, when we were alone, he said, "Did you really make that pie?"' She pauses to let the injustice, the sheer effrontery, of the question settle in. 'I mean, who says that?'" — David Denicolo, Allure, November 2016
Did You Know?
To the Romans, the shameless were "without forehead," at least figuratively. Effrontery derives from Latin effrons, a word that combines the prefix ex- (meaning "out" or "without") and frons (meaning "forehead" or "brow"). The Romans never used effrons literally to mean "without forehead," and theorists aren't in full agreement about the connection between the modern meaning of effrontery and the literal senses of its roots. Some explain that frons can also refer to the capacity for blushing, so a person without frons would be "unblushing" or "shameless." Others theorize that since the Romans believed that the brow was the seat of a person's modesty, being without a brow meant being "immodest" or, again, "shameless."
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