This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The state or characteristic of being shameless.

n. An utterance or action which is shameless.

n. The state or character of being shameless; utter want of shame; lack of sensibility to disgrace or dishonor; impudence.

n. behavior marked by a bold defiance of the proprieties and lack of shame

"Zafon's shamelessness is matched only by the magnificence of his prose, which lovingly captures the dark-and-stormy-night campiness with reckless abandon, and occasionally ventures into surprisingly insightful territory."

daring    hardiness    hardihood    boldness   

rapaciousness    outrageousness    gormandism    immodesty    bawdry