“high treason” in Latin

perduellio (a crime by which the freedom of the citizens is endangered, or public security disturbed): crimen majestatis, or (later) laesae majestatis (the crime of him who violates the dignity, or disturbs the peace and security of the Roman people; e.g., by betraying one of its armies, by promoting sedition or uproar; and, later, by any offence against the sacred person of the prince; ☞ Heinecc: Antiquities, Rom. Synt., 4, 18, 46, sqq.). In the times of the Republic, the orators, etc., called “high treason” parricidium patriae; or used the general term scelus (opposed to pietas; ☞ Cic., Sull. 2, 6; Off., 3, 21, 83; Cat., 2, 1, 1, and 11, 25; Vid: commentators). To be guilty of high treason, majestatem populi Romani minuere or laedere (against the state of Rome); patriae parricidio obstringi or se obstringere: to declare anything high treason, juaicare aliquid contra rempublicam factum esse. One who is guilty of high treason, perduellis: civium or reipublicae parricida (Cic., Sall.); proditor (traitor): one who is charged with high treason, perduellionis reus, majestatis reus.