indecorum

/ˌɪndɪˈkɔrəm/
noun
  1. Behavior that is not proper, polite, or socially acceptable.
    • Her indecorum at the formal dinner embarrassed her parents.
    • The politician's indecorum during the debate shocked the audience.
    • Laughing loudly at a funeral was considered an act of indecorum.
Antonyms
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