dictatorial system; dictatorship
Refers to a political system where power is concentrated in a single ruler or small group, often with suppression of opposition.
That country has been under a dictatorial system for many years.
Under a dictatorship, free press is not permitted.
独裁 is the abstract concept of dictatorship or autocratic rule, while 独裁体制 specifically refers to the system or regime itself.
専制 emphasizes absolute rule by a monarch or despot, often with a historical or classical nuance, whereas 独裁体制 is a modern political term for a dictatorial system.
Compound of 独裁 (どくさい, 'dictatorship, autocracy') and 体制 (たいせい, 'system, regime').