misprision

गुप्तापराध; गंभीर अपराध या राजद्रोह की जानकारी जानबूझकर छिपाने का अपराध, जो पहले उस अपराध का कम गंभीर रूप माना जाता था

In full misprision of felony or misprision of treason: originally, a less serious form of felony or treason; later, the crime of (intentionally) failing to give information about a felony or treason that one knows about; (countable) an instance of this.