noun
Refers to a person who plans or carries out a secret plot with others, often in a criminal or political context.
彼はその陰謀の共謀者として逮捕された。
He was arrested as a conspirator in the plot.
共謀者の一人が自首した。
One of the accomplices turned himself in.
Compound of 共謀 (conspiracy) + 者 (person).