benevolent rule of a country / proper technique, a procedure without flaws / conventional technique/way / (calque of English royal road) an easy or painless way to do something

European (Latin) characters

tyrannical, oppressive

tyranny, oppression

palace of the king

Same as above.

(geometry) circular sector (shape)

the Hashemite Kingdom of Jordan

rajah / (historical) Head of the Ryukyu Domain

viceroy; one who governs a country, province, or colony as the representative of a monarch.