imperatory
/ˌɪmpɛrˈɑːtɔri, -ˈɒtɔri/Definitions
1. adjective
relating to or characteristic of an emperor or empire
“The imperatory style of the palace reflected the grandeur of the ancient empire.”
2. noun
a person or thing that exercises imperial power or authority
“The imperatory leader brought stability to the war-torn country.”