overmighty

adjective

over·​mighty ˌō-vər-ˈmī-tē 

: excessively powerful or mighty

… the overmighty barons of feudal times whom the Tudors are commonly credited with having tamed.

—John Hall

… fundamental rights protected from the encroachments of an overmighty government …

—Richard John Francis Gordon and Richard Wilmot-Smith

… led to many cries for legislation on picketing to clip the power of the overmighty trade unions …

—Kenneth O. Morgan

Word History

First Known Use

15th century, in the meaning defined above