1. Feeling no shame; impervious to disgrace.
2. Marked by a lack of shame: a shameless lie.
Synonyms: shameless, brazen, barefaced, brash1, impudent, unblushing
These adjectives apply to that which defies social or moral proprieties and is marked by a bold lack of shame. Shameless implies a lack of modesty, sense of decency, or regard for others' rights or feelings: a shameless liar; a shameless accusation. Brazen suggests flagrant, insolent audacity: a brazen impostor; brazen arrogance. Barefaced specifies undisguised brazenness: a barefaced hypocrite; a barefaced lie. Brash stresses impetuousness, lack of tact, and often crass indifference to consequences or to considerations of decency: a brash newcomer; brash demands. Impudent suggests offensive boldness or effrontery: an impudent student; an impudent misrepresentation. Unblushing implies an inappropriate lack of shame or embarrassment: an unblushing apologist; unblushing obsequiousness.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.