degressively

/dɪˈɡrɛsɪvli/
adverb
  1. In a way that decreases or reduces gradually.
    • The discount is applied degressively, with the biggest savings on the first purchase.
    • The company's costs fell degressively as production scaled up.
    • Tax rates are structured degressively to lower the burden on higher earners.
Synonyms
What does "degressively" mean? | whatsthatwordmean | whatsthatwordmean