treasonable

Stripping royal titles was something reserved for those who committed near treasonable offenses or no longer considered part of the extended royal clan.

Amid this crackdown, army chief Christopher Musa warned that it is a "treasonable offence" to fly the flags of foreign countries.

“To me, those acts are treasonable,” Solensten said of the Bidens.

All five have been charged with being suspected members of a terrorist group and planning “highly treasonable” acts against the government, it said.

Randolphs unfortunate utterances were not truly treasonable, as he spent the remainder of his life trying vainly and in his foggy style to explain.