derogation

noun

der·​o·​ga·​tion ˌder-ə-ˈgā-shən 

: a taking away or detraction from something (as the force of a law)

the executive was without power to act in derogation of international law

—Jules Lobel

Word History

Etymology

Latin derogatio partial abrogation of a law, from derogare to detract from the force of (a law)