noun
treacherous retainer; rebellious vassal
Historical term for a vassal or retainer who betrays their lord, often in the context of feudal Japan. Rare in modern conversation except when discussing history or period dramas.
戦国時代には、逆臣が主君を裏切る例が多かった。
During the Warring States period, there were many cases of treacherous retainers betraying their lords.