supreme authority; great power
Refers to the highest level of authority, often in political or legal contexts. Can be used historically for imperial prerogative or in modern contexts for ultimate decision-making power.
The Emperor held supreme authority.
That decision falls under the president's supreme authority.
infringement of sovereign prerogatives
Compound of 大 (great) and 権 (authority, right). The exact historical derivation is uncertain, but it has been used in Japanese legal and political terminology to denote supreme authority.