a. Obs. rare. [f. as prec. + -ISH1.] Of the nature of treason; somewhat treasonable.
1672. Eachard, Hobbes’ State Nat., 98. Is not this very pragmatical and somewhat treasonish?
1681. T. Flatman, Heraclitus Ridens, No. 26 (1713), I. 169. Is not endeavouring to subvert it [monarchy] something like Treasonish?
