noun
instigator; abettor
Formal or legal term for a person who incites or encourages another to commit a crime or wrongful act. Not used for casual encouragement.
彼は犯罪の教唆者として逮捕された。
He was arrested as an instigator of the crime.
扇動者 is an agitator or inciter, often in a political or social context, while 教唆者 is more strictly legal and implies urging someone to commit a specific crime.
Compound of 教唆 (instigation) + 者 (person). The exact historical derivation is uncertain, but the term is used in modern legal contexts.