The antonyms for the word "dethrone" would be to enthrone, crown, or enshrine. These words are often used to describe the opposite of removing a ruler from power, and instead, officially giving them the position of authority.
Enthrone refers to the ceremonial act of seating a monarch on their throne, while crown represents the act of placing a crown on their head to signify their power. Enshrine signifies a person or object being accepted and placed in a secure or sacred place of honor.
These antonyms demonstrate a reversal of power or status and indicate the transfer of power from one person to another, representing a shift in leadership and authority.