Definition of treasonous :
disobedient (part of speech: adjective)
disobeying, wayward, anarchistic, disloyal, ungovernable, mischievous, out of control, factious, traitorous, intractable, treacherous, disobedient, mutinous, disregardful, contrary, rebellious, nonconformist, seditious, subversive, undisciplined, recalcitrant, insubordinate, unmanageable, defiant, misbehaving, unruly
- " Master Noel had behaved in a traitorous manner, and so by law he was ejected as a papist and a dealer in treasonous things. - "The Coming of the King", James Hocking.
- She sat upon many offenders as a judge, and it is handed down that she executed divers persons for treasonous designs and plotting against her estate. - "Bygone Cumberland and Westmorland", Daniel Scott.
- I have just discovered that there exists a treasonous plot against your life. - "Ministry of Disturbance", Henry Beam Piper.