misprision

/mɪsˈprɪʒən/
noun
  1. The act of hiding or not reporting a crime or wrongdoing, especially a serious one like treason.
    • Misprision of felony is a crime in some legal systems.
    • The witness committed misprision by staying silent about the robbery.
    • He was charged with misprision of treason for not telling the authorities.
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