Malignant må-lig'-nant, a

Nuttall's Standard Dictionary of the English Language · 1890 · p. 114

having extreme malevolence: unpropitious or exerting pernicious influence; virulent; tending to a fatal i ue; extremely heinous: 8. one evilly-disposed, specially a name applied by the Puritans to a supporter of the royalist cause. Malignantly,må-lig'-nant-le, ad. in a malignant manner.