nonadditive

/ˌnɑnˈædɪtɪv/
adjective
  1. Not involving addition; not able to be added together in a simple way.
    • Some costs in the budget are nonadditive, meaning you cannot just sum them up to get the total.
    • The scientist explained that the results were nonadditive because the chemicals interacted in complex ways.
    • In this game, the effects of power-ups are nonadditive, so combining them doesn't double their strength.
What does "nonadditive" mean? | whatsthatwordmean | whatsthatwordmean