degression

noun
de·​gres·​sion | \ dēˈgreshən\
plural -s

Definition of degression

1 : a stepping or movement downward : descent used chiefly as a correlative of progression
2 : the decrease in rate in degressive taxation

History and Etymology for degression

Middle English degressioun, from Medieval Latin degression-, degressio, from Latin degressus (past participle of degredi to go down, from de- + -gredi) to go, step + -ion-, -io -ion

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