Septembrist (n.)youdaoicibaDictYouDict[Septembrist 词源字典]
1798 in reference to French history, a participant in the massacre of the political prisoners in Paris, Sept. 2-5, 1792. In French, Septembriseur, hence English Septembriser (1797). Hence also septembrize "assassinate while in custody" (1793).[Septembrist etymology, Septembrist origin, 英语词源]